Ch 7

Question 1

Angle

Answer 1

Union of two non collinear rays with some common point rays are called arms and common point as vertex

Question 2

Degree

Answer 2

When the circumference of a circle is divided into 360 equal arcs the angle subtended at the center of the circle by one arc is called one degree and is denoted by 1°

Question 3

Radian

Answer 3

The angle subtended at the centre of the circle by an arc whose length is equal to the radius of the circle is called one radian

Question 4

Co terminal angle

Answer 4

Two or more than two angles with the same initial and terminal sides are called coterminal angles

Question 5

Quadrantal angle

Answer 5

It the terminal side of an angle in standard position falls on X axis or y axis then it is called a quadrantal angle