Pay close attention to quilt directions say to cut two or four triangles from a square. Where the bias edges are plays a big part in piecing the triangles into your quilt.

Half-square triangles, or right triangles, can be quickly and accurately cut with a rotary cutter. Many quilts can be made with half-square triangles (two triangles cut from one square).

If you need to cut half-square triangles, our instructions will say something like this:

From light green print, cut:
2-4-7/8" squares, cutting each in half diagonally for 4 large triangles total

First cut the squares in the size specified in the instructions. Then line up a ruler's edge with the opposite corners of the square. Cut along the ruler's edge to cut the square in half diagonally; separate the triangles. Repeat with the remaining square. Because the triangles' long edges are on the bias, avoid stretching them when piecing so you don't distort the seams.

Quarter-Square Triangles

If you need to cut quarter-square triangles, our instructions will say something like this:

From purple print, cut:
2-5-1/4" squares, cutting each diagonally twice in an X for 8 small triangles total

First cut the squares the size specified. Then line up a ruler's edge with opposite corners of a square. Cut along the ruler's edge to cut the square in half diagonally, but do not separate the resulting two triangles. Instead, line up the ruler's edge with the remaining corners and cut along the ruler's edge to make four triangles total; separate the triangles. Because the triangles' short edges are on the bias, avoid stretching them while piecing so you don't distort the seams.

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