How to Cut an Equilateral Triangle Out of Wood

Hey there! Some links on this page may be affiliate links which means that, if you choose to make a purchase, I may earn a small commission at no extra cost to you. I greatly appreciate your support!

Woodworking is a skill that requires patience and precision. In this guide, we’ll explain how to cut an equilateral triangle from wood using simple hand tools.

An equilateral triangle is a polygon with three equal sides, so its shape has an inherent symmetry that makes it ideal for geometric exercises or decorative woodworking projects.

how to cut an equilateral triangle out of wood
how to cut an equilateral triangle out of wood

We’ll start by reviewing some basic geometry properties of the equilateral triangle to refresh your understanding of this shape.

Then I’ll walk you through planning the project by selecting the right wood material and tools for crisp, accurate cuts.

Safety is priority one in the workshop, so I’ll outline proper protective equipment and techniques for operating handsaws.

With your material and tools prepared, the real work begins. I’ll give you detailed, step-by-step instructions for measuring and marking the triangle on your wood blank so you can transfer the design perfectly.

Paying close attention to every step of the cutting process will ensure you end up with three equal sides meeting at equal angles.

Finishing touches like sanding and applying a protective topcoat really make the triangle design pop. Finally, I’ll conclude with some tips for cleaning up efficiently and storing your tools and extra wood for future projects.

If you follow the guidance in this guide, you’ll walk away with new woodworking and geometry skills to take your projects to the next level. 


The first consideration for any woodworking project is selecting the right type of wood for the job. For cutting an equilateral triangle, I recommend choosing either a hardwood or softwood based on your needs and preferences.

Hardwoods like oak, maple or cherry are very durable and will withstand heavy use, making them great choices if you intend to incorporate the triangle into furniture or other functional builds.

The tradeoff is that hardwoods can be more difficult to cut precisely and are usually more expensive than softwoods.

Some suitable softwood options include pine, fir or basswood. While not as sturdy as hardwoods, softwoods are very easy to work with, even for beginners just developing their skills.

They’re also more affordable. The downside is softwood projects may not last as long outdoors or with heavy handling.

In terms of tools, a simple handsaw is all you need for cleanly cutting the triangle shape. Choose a fine-tooth blade suited for either softwood or hardwood based on the material you’ve selected.

You’ll also need a sharp hobby knife or utility knife, a ruler, protractor and clamps to hold your wood securely. I also recommend wearing basic shop accessories like safety glasses and working gloves for protection.


Safety should always be the top priority when working with tools in the shop. While cutting an equilateral triangle is a simple project, it still requires care and caution, especially when using sharp handsaws. Let’s go over the key safety steps to take.

First, ensure you’re working in a clean, well-lit space that’s free of clutter, debris or distractions. Tie back long hair, remove loose jewelry, and wear properly-fitting clothing without loose sleeves or dangling elements that could potentially get caught.

Next, protect your eyes with ANSI-approved safety glasses. Wood shavings and stray saw fibers can easily flit into eyes without protection.

I also recommend picking up a pair of snug-fitting leather work gloves to shield your hands from nicks, splinters or abrasions that hand tools can cause.

Proper technique is everything when sawing. Stand securely with a balanced stance and hold the saw firmly but not too tightly.

Grip the handle, not the actual saw blade. Saw with long, steady strokes while keeping the blade oriented at a safe angle.

Take breaks if you start to feel fatigued – that’s when accidents are more likely to happen. Stay focused and move or secure any unused tools out of your immediate workspace to avoid tripping hazards.

If you follow these basic precautions, you’ll be able to cut your equilateral triangle smoothly and safely. 

Designing the Triangle

Now that we’ve gathered our materials and safety gear, let’s refresh our understanding of equilateral triangle geometry so we can accurately mark out our design.

By definition, an equilateral triangle has all three sides of equal length. It also has all three internal angles that are equal to 60 degrees each. This specific shape arrangement creates a triangles with perfect symmetry.

To start marking our design, we’ll need a ruler and either a compass or protractor. Draw a center point on your wood blank where the triangles’ three vertices will meet.

Using your protractor or compass set to the radius of one of the triangle’s sides, carefully draw three identical 60 degree arcs radiating out from the center point. The intersection of these arcs will mark the vertices.

Double check that all three arcs are equidistant from the center and form smooth circles without any flattened spots. Take your time here – proper layout is crucial for an accurate final cut.

We’ll also want to label each vertex A, B and C so it’s easy to identify the start and endpoints of each cut line. Draw sharp, bold lines connecting the vertices to form the sides of the equilateral triangle.

You now have your design transfer completely mapped out. Proper planning at this stage makes the rest of the project go smoothly.

Cutting Process

With our triangle design accurately marked on the wood, it’s time for the main event – making those cuts. Proper technique is key to getting clean, precise results.

First, double check that your work area is still uncluttered and your material is securely clamped or screwed down. You’ll want both hands free to focus on sawing.

Pick a starting point for the first cut – usually one of the vertices is best. Grip the saw handle firmly and align the blade squarely on the cutting line. Draw the saw back slowly until you feel the teeth engage the wood.

Maintain consistent, steady pressure as you draw the saw gently forward in a straight line. Let the serrated teeth do the work for you. Go slowly and check your position often to stay right on the line.

As you near the end of the first cut segment, start to ease up pressure to avoid breaking out the other side unevenly. Complete the cut, then check for any splintering that may need light sanding.

Continue onto the next cut line, then the third to make a full pass around the entire triangle. Resist the temptation to rush – slow, precise strokes are safer and give you best results.

With practice, your cuts will become truer and smoother. Let me know if you encounter any stubborn knots or problem spots needing an alternate approach.


No project is complete without some final touches. In this stage, we’ll smooth out any saw marks or unevenness before protecting the wood’s surface.

The first step is using progressively finer grit sandpaper to gently buff the triangle sides and edges. Start with 150-grit to remove tool marks, then step up through 220 and finally 400-grit for a silky finish.

Work systematically in one direction and remove any dust frequently. You can also use a sanding block or spare scrap of wood to ensure even sanding pressure. Take care around tight corners and edges.

Once sanded, you have a few protective topcoat options. For an elegant clear coat, try wiping on a few thin layers of polyurethane or lacquer with a soft cloth. These dry quickly while accenting the wood grain.

For a more durable outdoor-safe finish, try painting on spar urethane intended for marine use with a small high-quality brush. Multiple thin coats are key – avoid thick lumpy brush strokes.

Allow sufficient drying time between coats as directed, usually an hour or more. Lightly sanding between coats removes dust nibs and helps subsequent layers level out perfectly smooth.

With finishing wraps up, use a quality wax or wood polish if desired for an extra pop. Sign and date your completed triangular masterpiece before presenting or storing it neatly until needed for a future project.

Proper finishing is the final touch that transforms your cut equilateral triangle into a professional-looking keepsake. 

Tool Care and Storage

No collection of shop tools is complete without proper care, cleaning and storage practices. Taking good care of your equipment keeps it performing at its best for many projects to come.

To clean saw blades and other cutting edges, use a file or sharpening stone to remove any trapped wood fibers or bent metal. Wipe all surfaces with a soft cloth dampened in mineral spirits to disinfect.

Lightly coat blades and exposed metal with a thin film of tool oil or lubricant before storage. This prevents rusting.

For wood surfaces like saw plates or tool handles, dampen a cloth in warm soapy water. Gently wipe away any residue, then immediately dry and apply a light conditioner if desired.

Organize tools neatly on a magnetic strip, in a rack or toolbox. label compartments by type to make things easy to find in a hurry. Periodically check for rust, damage or wear and replace as needed.

Store your equilateral triangle creation in an acid-free box along with any project remnants until your next build. Proper tool upkeep avoids headaches and ensures reliable performance for years to come.

With cleanup complete, you’re set to take your newfound woodworking and geometry skills to future projects.


By following the guidance in this guide, you’ve now gained experience cutting an accurate equilateral triangle from wood. Let’s briefly review the key points you’ve learned.

Always start with proper planning – selecting the appropriate material, gathering needed tools and reviewing safety procedures. Taking time at this stage ensures a smooth overall process.

Laying out the triangle design precisely onto the wood blank through careful measurement and marking is absolutely critical for success. check and re-check dimensions.

Staying focused, maintaining controlled strokes and going slowly led to clean cuts around each side and vertex of the triangle shape. Practice developing muscle memory and honing your technique.

Sanding and a protective topcoat not only protects the wood but really makes the design visually pop. Finishing is often underrated but hugely important.

Proper tool care, storage and regular sharpening keeps your equipment in top working condition between projects so it’s there when inspiration strikes.

With practice, your abilities will grow exponentially. Try scaled drawings beforehand or experimenting with different wood types. Mastering fundamentals breeds creativity.