Question

A pair of angles whose sum is 90 degrees are called

Answer 1

you can easily look this up

Answer 2

that is so easy

Answer 3

think of a corner of a room and then think about which angle is between the smallest and largest angle

Answer 4

complementary angles ! @ShaTay

Answer 5

no but now look at your hands say left angle and right angle and choose which one sounds the most familiar