Question

If the lines 3x − 4y 4 0 and 6x − 8y − 7 0 are tangents to a circle then the radius of the circle is

Answer 1

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Prove “if two lines intersect each other, then the vertically opposite angles are equal.”

Let AB and CD be two lines intersecting at O. Ray OE bisects ∠AOB and OF is the ray opposite to OE.