9. The points A[−1, 1, 1], B[2, 0,3], and C[3,3,-4]. Show that this triangle is a right-angle triangle.

Determine the type of triangle represented if the lengths of its sides are: a a=1.5, b= 2 and c = 2.5 b a= 20, b= 21 and c = 29 c a=10, b= 12, and c =16 d a= 5, b= 7 and c = 9

Is it possible to draw a triangle whose angles measure a. 100, 100, and 60? b. 45, 45, and 90?

What relationship, if any, exists between two angles a with equal measures? b that have the same vertex and a common side between them?