Question

in a right angled triangle one angle must be ​

Answer 1

Answer:

In a right angel triangle, one angle must be 90 degrees, or pi/2 radians, which the other 2 angels are complimentary.

Answer 2

Answer:

90 degrees

Step-by-step explanation:

Since the three interior angles of a triangle add up to 180 degrees, in a right triangle, since one angle is always 90 degrees, the other two must always add up to 90 degrees (they are complementary). The side opposite the right angle is called the hypotenuse.