Answer:
AAS, the two equal angles, the two right triangles, and the shared side
Step-by-step explanation:
Step-by-step explanation:
I believe it's 16 1/2. I just used MathPapa lol.
Answer:

» Collect like terms, r terms on the left hand side by subtracting r from both sides and adding st to both sides

» On the left hand side, factorise out r
