Because there both addition
Answer:
Its C I know but I have my friend that knows this by heart
Answer:
13 pounds
Step-by-step explanation:
21-12=13
To find out if the triangle is a right triangle, we must check if the following equation is true:

on the left side, we have:

and on the right side, we have:

since on both sides we get 625, we have that the brace forms a right triangle.
It would be 91°. Angles M and R correspond to each other.