# Lines and Angles – Chapter 4/CBSE Class 7 Maths Worksheet

Lines and Angles – Chapter 4/Worksheet is about the important questions that you can expect for Yearly Examination. Here you can find out practice problems for Class 7 Mathematics. This Worksheet is designed for CBSE Class 7 students.

Important Questions for CBSE Class 7 Mathematics
Lines and Angles – Chapter 4/Worksheet
Fill in the blanks:

1. The complement of the angle 30 degree is —————-
2. Angles which are supplementary and vertically opposite are ———–
3. One of the angles in a linear pair is 80 degrees, then the other angle is —-
4. The angle which is equal to its complement is —————-
5. Two angles are said to be supplementary, if their sum is ——– degree.
6. Find the complement of each of the following angles:
i) 45 degree
ii) 80 degree
7. Find the supplement of the following angles:
i) 110 degree
ii) 50 degree
8. If the angles 2x + 3 and 4x – 3 are supplementary angles, find the value of x?
9. Find the angle which makes a linear pair with the following angles:
i) 125 degree
ii) 85 degree
10. Which of the following pairs of angles are complementary?
i) 25 degree and 65 degree
ii) 95 degree and 85 degree

1. 60 degree
2. 90 degree, 90 degree
3. 100 degree
4. 45 degrees
5. 180 degree
6. i) Complement of 45 degree is 90 – 45 = 45 degree
ii) Complement of 80 degree is 90 – 80 = 10 degree
7. i) Supplement of 110 degree is 180 – 110 = 70 degree
ii) Supplement of 50 degree is 180 – 50 = 130 degree
8. Given 2x + 3 + 4x – 3 = 180 degree (Since it is supplementary)
6x = 180
x = 180/6 = 30 degree
9. i) 180 – 125 = 55 degree
ii) 180 – 85 = 95 degree
10. i) Since 25 + 65 = 90 degree, it is complementary
ii) Since 95 + 85 = 180 degree, it is supplementary.