Mathematics for IGCSE & O level - Circle Theorems (Section 1 - No. 50)
Which statements are accurate about the properties of circle theorems?
Equal chords in a circle are equidistant from the center.
The angle in a semicircle is 90 degrees.
Tangents from an external point to a circle are unequal in length.
Opposite angles in a cyclic quadrilateral are supplementary.
解释
Chords, semi-circle, and cyclic-quadrilateral properties are correct.