posted by lizzie on .
how do i find the degree of a right angle, split into two different angles.
ex. if m<10 = 80*, then m<11 = ?
The two angles must add to 90 degrees
so if one of them is 10
then the other one is 90 - 10
If one is 40
then the other is 90 - 40
Angles that add to a right angle are called complementary.