# Polygons and Angles

- A triangle that has two equal sides is a:

(a) Scalene triangle (b) Equilateral triangle

**(c) Isosceles triangle**(d) Exterior triangle -
The plane with six edges as its sides is called:

(a) Quadrilateral**(b) Hexagon**

(c) Octagon (d) Pentagon -
The type of polygon in which its all angles and sides are equal is classified as:

(a) Regular octagon (b) Regular hexagon

(c) Regular pentagon**(d) Regular polygon** -
A plane which is formed by three straight edges as its sides is called:

(a) Quadrilateral (b) Pentagon

**(c) Triangle**(d) Hexagon -
A right-angled triangle must have:

**(a) 1 right angle**(b) 2 right angles

(c) 3 right angles (d) 4 right angles -
A plane with eight edges as its sides is classified as:

(a) Quadrilateral**(b) Octagon**

(c) Pentagon (d) Hexagon -
The triangles can be classified on the basis of:

(a) The number of equal sides (b) The types of angles

(c) Length of line segments**(d) Both (a) and (b)** -
The plane with five edges as its sides is called:

(a) Octagon (b) Quadrilateral

**(c) Pentagon**(d) Hexagon -
The polygon is said to be convex polygon if none of its interior angles is:

(a) Right angle**(b) Reflex angle**

(c) Acute angle (d) Obtuse angle -
A plane with ten edges as its sides is called:

(a) Octagon (b) Pentagon

(c) Hexagon**(d) Decagon** -
The types of convex polygons include:

(a) Heptagon (b) Hexagon

(c) Octagon**(d) All of the above** -
The kind of triangle which has no equal sides is called:

(a) Exterior angle (b) Isosceles triangle

(c) Equilateral triangle**(d) Scalene triangle** -
The plane with four straight edges as its sides is called:

**(a) Quadrilateral**(b) Octagon

(c) Hexagon (d) Pentagon -
The triangle which consists of three equal sides is classified as:

**(a) Equilateral triangle**(b) Exterior angle

(c) Isosceles triangle (d) Scalene triangle -
The acute-angled triangle must have:

(a) 2 acute angles**(b) 3 acute angles**

(c) 4 acute angles (d) 1 acute angle -
The plane figure which consists of three or more edges as its sides is called:

(a) Equilateral polygon**(b) Polygon**

(c) Scalene triangle (d) Isosceles triangle -
The plane with thirteen edges as its sides is called:

(a) Quadrilateral (b) Septagon

(c) Multigon**(d) Tridecagon** -
The kind of triangle which has one angle greater than 90o is called

(a) Equilateral triangle**(b) Obtuse triangle**

(c) Exterior angle (d) Isosceles triangle

The writer teaches General Ability at World Times Institute.