Question: please solve YA a rhombus. 9. Prove that an angle inscribed in a semicircle is a right C(b, c) angle. (Hint: The coordinates of C

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please solve YA a rhombus. 9. Prove that an angleplease solve YA a rhombus. 9. Prove that an angle
YA a rhombus. 9. Prove that an angle inscribed in a semicircle is a right C(b, c) angle. (Hint: The coordinates of C must satisfy the `equation of the circle.) A(-a, 0) O B(a, 0) Ex. 9YA C (b , c ) A(-a, 0) O B(a, 0) 10. Prove that the sum of the squares of the lengths of the sides of a parallelogram is equal to the sum of the squares of the lengths of the diagonals. Ex. 9

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