This unique mystery picture gives students the opportunity to calculate the missing angle in a triangle. There are 40 questions total. They will use the angle measures to color in the picture correctly. Although not every triangle on the page is labeled, they will be able to see the elephant and finish coloring the picture as they see fit.
The included answer key makes it easy to grade and check that students are understanding the concept. You can further expand this activity by sorting triangles based on angles and sides.
Enrichment option: Picture B is slightly more difficult because it is missing some angle measures that students can figure out using knowledge of complementary angles, supplementary angles, and degrees in a circle. It uses the same answer key.