4.8 · Circle theorems IILesson 2 of 8Free preview
Chords, radius and distance from the centre
Half the chord, the distance from the centre and the radius make a right-angled triangle, so Pythagoras' theorem links them.
4.8 · Circle theorems IILesson 2 of 8Free preview
Half the chord, the distance from the centre and the radius make a right-angled triangle, so Pythagoras' theorem links them.