opposite angles congruent

Which quadrilateral has equal opposite sides and all its angles congruent? => a trapezoid or a parallelogram or a square or a rectangle..

In the figure given below, the shaded triangles are congruent and isosceles. Each angle opposite to the sides forming the pentagon measures 72 degrees. The area of each shaded triangle is 'A'. Find the area of unshaded region in the figure. => 27 4 A or 8 A or 5 A or 2..

Which statement helps you conclude that the quadrilateral shown is a rhombus? I. It has two pairs of parallel opposite sides. II. It has all its sides congruent. III. It has four right angles. => I only or I and II or II only or I, II, and III..

of a quadrilateral: Two angles, which do not include a side in their intersection, are called the opposite angles of a quadrilateral..

When two straight lines intersect each other at a point, the pairs of opposite angles so formed are called vertically opposite angles..

When two straight lines intersect each other at a point, the pairs of opposite angles so formed are called vertically opposite angles. Angles 1 and 3 and angles 2 and 4 are vertically opposite angles..

Prove that if both pairs of opposite sides of a quadrilateral are congruent, then the quadrilateral is a parallelogram...

Which of the polygons have congruent angles? => trapezoid or triangle or rectangle or rhombus..

Which pair of angles are congruent and vertical to each other? => ∠ 2 and ∠ 5 or ∠ 3 and ∠ 6 or ∠ 3 and ∠ 2 or ∠ 3 and ∠ 1..

If supplementary angles are congruent, each of them is a _____ angle. => Obtuse or Straight or Right or Reflex..