Cutting Half- and Quarter-Square Triangles

1. Square up the fabric.

2. Cut the fabric in strips as wide as the desired finished width of the triangle-squares, plus 7/8" for seam allowances. For example, for a 3" finished half-square triangle, cut a 3-7/8"-wide fabric strip.

3. Square up one end of each strip.

4. Using a ruler, cut the strip into lengths equal to the strip's width. In this example, the strip would be cut into 3-7/8"-long pieces.

5. Position the ruler diagonally across a square and cut the square in half to make two equal-size right triangles.

1. Square up the fabric.

2. Cut the fabric in strips as wide as the desired finished width of the triangle-squares, plus 7/8" for seam allowances. For example, for a 3" finished half-square triangle, cut a 3-7/8"-wide fabric strip.

3. Square up one end of each strip.

4. Using a ruler, cut the strip into lengths equal to the strip's width. In this example, the strip would be cut into 3-7/8"-long pieces.

5. Position the ruler diagonally across the square and cut the square in half to make two equal-size right triangles.

1. Square up the fabric.

2. Cut the fabric in strips as wide as the desired width of the quarter-square triangle, plus 1-1/4" for seam allowances. For example, for a 3" finished quarter-square triangle, cut a 4-1/4"-wide fabric strip.

3. Square up one end of each strip.

4. Using a ruler, cut the strip into lengths equal to the strip's width. In this example, the strip would be cut into 4-1/4"-long pieces.

5. Position the ruler diagonally across square and cut the square in half to make two equal-size right triangles. Do not move or pick up the triangles.

6. Position the ruler diagonally across the cut square in the opposite direction and cut the square in half again to make a total of four equal-size triangles.

1. Square up the fabric.

2. Cut the fabric in strips as wide as the desired width of the quarter-square triangle, plus 1-1/4" for seam allowances. For example, for a 3" finished quarter-square triangle, cut a 4-1/4"-wide fabric strip.

3. Square up one end of each strip.

4. Using a ruler, cut the strip into lengths equal to the strip's width. In this example, the strip would be cut into 4-1/4"-long pieces.

5. Position the ruler diagonally across square from corner to corner and cut the square in half to make two equal-size right triangles. Do not move or pick up the triangles.

6. Position the ruler diagonally across the square from corner to corner in the opposite direction and cut the square in half again to make a total of four equal-size triangles.

3. Square up one end of each strip.

4. Using a ruler, cut the strip into lengths equal to the strip's width. In this example, the strip would be cut into 4-1/4"-long pieces.

6. Position the ruler diagonally across the square from corner to corner in the opposite direction and cut the square in half again to make a total of four equal-size triangles.