Line: A line is a straight path of points that has no beginning or end. Line Segment: It is a portion of a line that has two end points. Ray: It is a portion of a line which has one end point and extends forever in one direction.

9. S.NO. PAIR OF ANGLES COMPLEMENTARY
(90°)
SUPPLEMENTARY
(180°)
1. 69 , 21 ✔
2. 156 , 24 ✔
3. 33 , 147 ✔
4. 56 , 34 ✔
5. 111 , 69 ✔
6. 83 , 97 ✔
7. 161 , 19 ✔
8. 11 , 79 ✔

11. Find the complement of:
 1. Two angles are said to be
complementary if the sum
of their measures is 90o.
 The given angle is 20o
 Let the measure of its complement be xo.
 Then,
 x + 20o = 90o
 x = 90o – 20o
 x = 70o

12.  2. Two angles are said to be
complementary if the sum
of their measures is 90o.
 The given angle is 57o
 Let the measure of its complement be xo.
 Then,
 x + 57o = 90o
 x = 90o – 57o
 x = 33o

13. Find the supplement of:
 1. Two angles are said to be
supplementary if the sum
of their measures is 180o.
 The given angle is 105o
 Let the measure of its supplement be xo.
 Then,
 x + 105o = 180o
 x = 180o – 105o
 x = 75o

14.  2. Two angles are said to be
supplementary if the
sum of their measures is
180o.
 The given angle is 87o
 Let the measure of its supplement be xo.
 Then,
 x + 87o = 180o
 x = 180o – 87o
 x = 93o