Q1 of 56 Page 78

One angle of a quadrilateral is of 108° and the remaining three angles are equal. Find each of the three equal angles.

Let the remaining three equal angles be x.

We know,


Sum of all interior angles of a quadilateral is









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Diagonals of a quadrilateral ABCD bisect each other. If ÐA = 35°, determine ÐB.

 14

Opposite angles of a quadrilateral ABCD are equal. If AB = 4 cm, determine CD.

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ABCD is a trapezium in which AB || DC and ∠A = ∠B = 45°. Find angles C and D of the trapezium.

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The angle between two altitudes of a parallelogram through the vertex of an obtuse angle of the parallelogram is 60°. Find the angles of the parallelogram.