Q16 of 160 Page 144

If two adjacent angles of a parallelogram are (5x-5)° and (10x + 35)°, then the ratio of these angles is

Adjacent angles of a parallelogram are supplementary

5x-5 + 10x + 35 = 180

⇒ 15 x + 30 = 180

⇒ 15x = 150

⇒ x = 10

⇒ 5x-5 = 45⁰

⇒ 10x + 35 = 135⁰

⇒ Ratio = 1:3

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A quadrilateral whose all sides are equal, opposite angles are equal and the diagonals bisect each other at right angles is a ______.

A quadrilateral whose opposite sides and all angles are equal is a