Understanding Quadrilaterals

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

• (a) 150°

• (b) 135°

• (c) 45°

• (d) 75°

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

• (a) Parallelogram

• (b) Isosceles Trapezoid

• (c) Trapezium

• (d) Rhombus

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

• (a) 180°

• (b) 360°

• (c) 540°

• (d) 720°

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

• (a) 1 : 3

• (b) 2 : 3

• (c) 1 : 4

• (d) 1 : 2

Which of the following satisfy the following properties?

All sides are congruent

All angles are right angles.

Opposite sides are parallel.

• Square

• Rectangle

• Kite

• Rhombus

Which of the following statements is incorrect ?

• A rectangle has all angles and all sides equal to each other.

• A hexagon as 6 sides.

• A regular octagon has 8 sides of equal length.

• A rhombus and a rectangle are irregular polygons. 

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

• 123 degree

• 125 degree

• 150 degree

• 175 degree

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

• n(n-1)/2

• n(n-2)/2

• n(n+3)/2

• n(n-3)/2

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

• (n-2)x181

• (n-2)x180

• (n-1)x180

• (n-2)x360

A circle is a ?

• Simple Closed Curve

• Simple Curve

• Polygon

• Open Curve