Mathematics for IGCSE & O level - Circle Theorems (Section 1 - No. 23)
Which statement accurately reflects the angle properties of a semi-circle?
The angle is always 180 degrees.
The angle is always 90 degrees.
The angle varies based on the radius.
The angle is always 45 degrees.
Giải thích
The angle inscribed in a semi-circle is always 90 degrees.