Angle at the circumference is half at the angle of the center proof

1.	Angle at the circumference is half at the angle of the center proof
Answer» Since an angle subtended at the circumference by an arc is HALF that subtended at the CENTRE, the ANGLES round the centre are 2a and 2b. Angles round a point add up to 360° so 2a + 2b = 360°. THEREFORE a + B = 180°, so the theorem is proven.

Answer»

Since an angle subtended at the circumference by an arc is HALF that subtended at the CENTRE, the ANGLES round the centre are 2a and 2b. Angles round a point add up to 360° so 2a + 2b = 360°. THEREFORE a + B = 180°, so the theorem is proven.

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Angle at the circumference is half at the angle of the center proof​

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Angle at the circumference is half at the angle of the center proof