Three triangle in square blocks

Hey Everyone, welcome back to Cool Tool Thursday on Friday.

I’ve always wanted to make a triangle in a square without using templates or having to do math and now I can with the Triangle Squared ruler from Creative Grids.

Creative Grids' Triangle Squared ruler

Triangle Squared ruler

This is the same company that makes the Perfect Rectangle ruler which I featured last summer and loved. It made perfect half square rectangle blocks with no fuss, muss, math or waste.

The ruler can be used to make perfect triangles in a square from 1 inch to 9 inches. If you want to make a 4 inch finished square then add a ½″ inch for the seam allowance and cut on the 4 ½″ line. A 6 inch square then cut on the 6 ½″ line.

Cutting the Triangle

To make a 4 inch square cut the strip of fabric at 4 ½″. Square off one end of the strip.

Place the ruler on the strip with the 4 ½″ line at the left hand bottom corner.

Ruler lined up and ready to cut for a 4 ½″ piece

Ruler in place with 4 ½″ line at bottom edge of fabric

Cut along the left hand side of the ruler. This piece will be waste.

Cut along left hand side of ruler first

First cut made

Cut along the right hand side of the ruler to create a triangle.

Triangle cut out of strip

Second cut made for a triangle

Flip the ruler over and cut along the right hand side of the ruler to create another triangle. Continue cutting triangles along the strip of fabric.

Ruler in place to cut next triangle

Flip ruler over to cut next triangle

Cutting the Side Pieces

For the side pieces rectangles need to be cut at half the size of the finished square plus ¾″. For this 4 inch square the rectangles are cut at 2 ¾″. Two rectangles are needed to go with each triangle to complete the square.

two rectangles needed for each triangle

Two rectangles 2 ¾″ x 4 ½″

Place the rectangles right sides together. This will ensure that the two cut pieces are mirror images and fit on either side of the triangle.

Rectangles placed together with right sides facing each other

Right sides together

Place the ruler so that the 4 ½″ line is flush with the right hand bottom corner of the rectangle. The numbers that run down the middle of the ruler will be in a ¼″ from the left hand edge of the rectangle to allow for the seam allowance.

Ruler placed on rectangles to cut side pieces

Ruler in place to cut side pieces

Cut along the right hand edge of the ruler to create the corner pieces. The excess is waste.

Side pieces cut

Side pieces cut on the left, pieces on the right are waste

Note: if you would prefer no waste then the Perfect Rectangle Ruler can be used to cut these pieces.

Making the Square

Add the side pieces to the triangle one at a time. When placing them on the square the top end will hang over the point of the triangle a ¼″. Remember that the edges have all been cut on the bias so handle with care. I press the seam away from the triangle.

Sew on the first side piece

First side piece in place ready to sew

Sew on second side piece

Second side piece ready to be sewn in plac

I found that once I had the pieces in place it needed to be trimmed down by an ⅛″.

Voila! A perfect square with a triangle in it.

Triangle in a square block

A perfect triangle in a square

I am looking forward to creating a new piece using this ruler in the coming weeks.

If you like, enjoy and value the content here on Quilts by Jen then please buy the Triangle Squared Ruler and the Perfect Rectangle Ruler at Amazon with these links and you’ll be helping me continue to provide these great resources on Quilts by Jen.



Happy Quilting!

Jen Transparent Signature