If three angles of a quadrilateral are each equal to 75°, then, the fourth angle is

For which of the following quadrilaterals, diagonals are perpendicular to each other?

What is the sum of all the angles of a pentagon?

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

Which of the following satisfy the following properties?

All sides are congruent

All angles are right angles.

Opposite sides are parallel.

Which of the following statements is incorrect ?

The measure of each interior angle of a rectangular polygon of 12 sides is ?

If a convex polygon has n sides, the no. of diagonals is given by ?

What is the formula for finding angle sum of a polygon if n is the number of sides ?

A circle is a ?