Mathematics for IGCSE & O level - Pythagoras' Theorem And Trigonometry (Section 2 - No. 40)

Which of the following statements is true about the angles in a right-angled triangle?

All angles must be equal.

The sum of the angles is 180 degrees.

One angle is always 90 degrees.

Both B and C

The sum of angles in a triangle is 180 degrees, one angle in a right triangle is always 90 degrees.