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Given that the vertices A, B, C of a qua...

Given that the vertices A, B, C of a quadrilateral ABCD lie on a circle. Also `angleA + angleC = 180^@` , then prove that the vertex D also lie on the same circle.

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Knowledge Check

  • ABC is an equilateral triangle such that the vertices B and C lie on two parallel lines at a distance 6. If A lies between the parallel lines at a distance 4 from one of them, then the length of a side of the equilateral triangle is :

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    C
    `(4sqrt(7))/(sqrt(3))`
    D
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