If two internal angles of a triangle are 30° and 90°, what is the angle of the third internal angle

Answer 1

The sum of the internal angles of a triangle is always 180°.

If two internal angles are 30° and 90°, the sum of those angles is 30° + 90° = 120°.

To find the third internal angle, subtract the sum of the two known angles from 180°:
180° - 120° = 60°

Therefore, the third internal angle of the triangle is 60°.