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7. If a point C lies between two points A and B such that AC=BC then prove that AC=$\frac{1}{2}$AB.

8 If the difference between two supplementary angles is 40$\xb0$ Then find the angles.

9 A chord of a circle is equal to the radius of the circle. Find the angle subtended by the chord

at a point on the major arc.

10 construct an angle of 135$\xb0$ with ruler and compasse

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