GraphicMaths - Angle in a semicircle is 90 degrees

The angle at the circumference in a semicircle is a right angle.

GraphicMaths - Tangent and radius of a circle meet at 90°

GraphicMaths - Angle in a semicircle is 90 degrees

Angle in a semi-circle – GeoGebra

Proof: Angle in a semicircle

Circle Theorem: Angle in a Semicircle Is 90° (Key Stage 3)

Circle Theorem 3 - The Angle in a semi-circle is always 90 degrees #circletheorem #mathinar

Circle theorem - the angle in a semicircle is a right angle - with proof

Circle Theorem: Angle in a Semicircle Is 90° (Key Stage 3)

GraphicMaths - Opposite angles in a cyclic quadrilateral add up to 180°

Circle Theorem: Angle in a Semicircle Is 90° (Key Stage 3)