This free printable geometric shapes worksheet will help your kids learn to draw a crescent and a triangle.
Let your children trace a crescent prior to drawing it. Start at the firefly which would help a lot. Learn that a crescent has the form resembling the new moon in shape which is shown in the worksheet. Make sure your kids remember the word and will recognize the shape.
Next pass to the triangle. It is a bit easier. It has three sides and sometimes may look like a hat.
Kids Academy provides all sorts of learning materials for children. Find more geometry practice worksheets there.