Practice problem
Given the following side lengths, identify which triangles are not right triangles.
1−1−21-1-\sqrt21−1−2
6−7−96-7-96−7−9
5.5−6−95.5-6-95.5−6−9
8−15−178-15-178−15−17
Type a concept, like “slope” or “photosynthesis”.