What are the geometry theorems in tenth grade geometry?

Answer:

I only know about 20 out of about 145, please also note that I combined some theorems, but here are the ones I do know:

If congruent angles/segments are added/subtracted from two congruent angles/segments, the sums/differences are congruent.

If congruent angles/segments are multiplied/divided from two congruent angles/segments, the like multiples/divisions are congruent.

Vertical angles are congruent.

If two angles are right angles, they are congruent.

If two angles are straight angles, they are congruent.

If a conditional statement is true, then the contrapositive of the statement is also true (If p, then q, If ~q, then ~p)

If angles are supplementary/complementary to the same angle, then they are congruent.

If angles are supplementary/complementary to congruent angles, then they are congruent.

If a segment/angle is added to two congruent segments/angles the sums are congruent.

All radii of a circle are congruent.

Hope this helps!!!

First answer by Olipuppy. Last edit by Olipuppy. Contributor trust: 1 [recommend contributor recommended]. Question popularity: 2 [recommend question].