This is another block with only a number for a name, in my programs, at least. It’s Mosaic #5.
Cutting Instructions:
Light Fabric: cut 8 squares @ 2 3/8 x 2 3/8 inches
Medium Fabric: cut 2 squares @ 2 3/8 x 2 3/8 inches
Dark Fabric: cut 6 squares @ 2 3/8 x 2 3/8 inches
Assembly:
Draw a diagonal line on the wrong side of each of the light 2 3/8 inch squares. Pair these right sides together with the 2 medium and 6 dark squares. Sew a 1/4 inch seam on either side of the drawn line. Cut apart on the drawn line and press to the dark fabrics.
Arrange as shown below and sew together.
Go here for the finishing instructions. The large triangles on the outside of this one are the darks.