2021 JMPSC Accuracy Problems/Problem 8

Problem

How many triangles are bounded by segments in the figure and contain the red triangle? (Do not include the red triangle in your total.)

Solution

We have symmetrical triangles about the right side, triangles containing sides, triangles in the middle, and triangle containing the right-two sides. The answer is

~Geometry285

See also

1. Other 2021 JMPSC Accuracy Problems
2. 2021 JMPSC Accuracy Answer Key
3. All JMPSC Problems and Solutions

The problems on this page are copyrighted by the Junior Mathematicians' Problem Solving Competition.