Twenty sided ball made from greeting cards

Step 3 Make an equilateral triangle template

You need to make three points equidistant from each other (an equilateral triangle) on the circle.

Take a sheet of notebook paper and using the jar lid, draw another circle. Cut out the circle and fold in half. Unfold and draw a line along that fold. Position the circle with the line running from top to bottom. Fold the bottom half up to the top half matching up the lines. Unfold and again position the circle with the line running from top to bottom. Fold the bottom edge to the middle fold line again matching the lines. Unfold. The top edge where the fold is and the lower two fold points make up an equilateral triangle.

Draw another circle and mark these three points on it, circling the points to make them stand out. See photographs for clarification.