2 more left

I answered C for both it was incorrect

19. The given points (4, -8), (4, -5), and (-2, -6) make a right triangle.

A Distance Formula

B Definition of a right triangle

CDefinition of a triangle

Dunfounded

E Pythagorean Theorem

F Definition of radius

20. The given points (2, -3), (-7, -7), (2, -7), and (-7, -2) make a square.

A Definition of coordinate

BPythagorean Theorem

CDefinition of a square

DDefinition of supplementary angles

E Distance Formula

F unfounded