Hey guys Two perpendicular chords AB and CD of a circle, centre O, intersect at E. Prove that + = 180 degrees. Could someone please help me? I can't seem to work this one out.
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Hello xwrathbringerx Originally Posted by xwrathbringerx Hey guys Two perpendicular chords AB and CD of a circle, centre O, intersect at E. Prove that + = 180 degrees. Could someone please help me? I can't seem to work this one out. In : (given) (angle sum of triangle) But (angle at centre = twice angle at circumference) and (angle at centre = twice angle at circumference) Grandad
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