Are opposite sides of a cyclic quadrilateral are equal?

If two opposite sides of a cyclic quadrilateral are equal, then the other two sides are parallel.

How do you prove that two sides of a quadrilateral are congruent?

If a quadrilateral is a parallelogram, then its opposite sides are congruent. If a quadrilateral is a parallelogram, then its opposite angles are congruent. If a quadrilateral is a parallelogram, then its diagonals bisect each other.

How many pairs of opposite sides are there in a quadrilateral?

2 pairs
There are 2 pairs of opposite angles in a quadrilateral. The angles connected by the two diagonals are the opposite angles.

What is the sum of each pair 1 point of opposite angles?

the sum of either pair of opposite angles of a cyclic quadrilateral is 180.

Which quadrilateral does not have both pairs of opposite sides congruent?

scalene quadrilateral
A scalene quadrilateral is a four-sided polygon that has no congruent sides.

Which figure is formed if opposite sides of a quadrilateral are congruent and parallel but none of the angle is 90 degree?

Parallelogram

Name of Quadrilateral	Description
Parallelogram	2 pairs of parallel sides. Opposite sides and opposite angles are congruent.
Rectangle	2 pairs of parallel sides. 4 right angles (90°). Opposite sides are parallel and congruent. All angles are congruent.

Are the sides of cyclic quadrilateral parallel?

If two sides of a cyclic quadrilateral are parallel, prove that the remaining two sides equal and the diagonals are also equal. (v) Its diagonals bisect each other at right angles. (vi) Its diagonals are equal and perpendicular. (vii) It has all its sides of equal lengths.

What happens if the opposite sides of a cyclic quadrilateral are parallel?

Therefore, if one pair of opposite sides of a cyclic quadrilateral are equal then the other pair of opposite sides are parallel. Draw the two diagonals of the quadrilateral. The two equal sides of the quadrilateral will subtend equal angles at the circumference of the circle.

How do you find the exterior angle of a cyclic quadrilateral?

The exterior angle formed if any one side of the cyclic quadrilateral produced is equal to the interior angle opposite to it. In a given cyclic quadrilateral, d1 / d2 = sum of the product of opposite sides, which shares the diagonals endpoints.

How to prove that a quadrilateral is an isosceles trapezium?

“Prove that a quadrilateral inscribed in a circle with two opposite sides equal, is an isosceles trapezium.”. Proof: Given that AD = BC, the angles DAB and CBA are equal, as they are inscribed in the equal arcs BCD and ADC. Therefore, the triangles ADB and BCA are congruent, and so have also equal altitudes DE = CF.

What is the proof of the cyclic quadrilateral?

There are two important theorems which prove the cyclic quadrilateral. In a cyclic quadrilateral, the sum of either pair of opposite angles is supplementary. Proof: Let us now try to prove this theorem.