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:
- The complement of the angle 30 degree is —————-
- Angles which are supplementary and vertically opposite are ———–
- One of the angles in a linear pair is 80 degrees, then the other angle is —-
- The angle which is equal to its complement is —————-
- Two angles are said to be supplementary, if their sum is ——– degree.
Answer the following: - Find the complement of each of the following angles:
i) 45 degree
ii) 80 degree - Find the supplement of the following angles:
i) 110 degree
ii) 50 degree - If the angles 2x + 3 and 4x – 3 are supplementary angles, find the value of x?
- Find the angle which makes a linear pair with the following angles:
i) 125 degree
ii) 85 degree - Which of the following pairs of angles are complementary?
i) 25 degree and 65 degree
ii) 95 degree and 85 degree
ANSWERS:
- 60 degree
- 90 degree, 90 degree
- 100 degree
- 45 degrees
- 180 degree
- i) Complement of 45 degree is 90 – 45 = 45 degree
ii) Complement of 80 degree is 90 – 80 = 10 degree - i) Supplement of 110 degree is 180 – 110 = 70 degree
ii) Supplement of 50 degree is 180 – 50 = 130 degree - Given 2x + 3 + 4x – 3 = 180 degree (Since it is supplementary)
6x = 180
x = 180/6 = 30 degree - i) 180 – 125 = 55 degree
ii) 180 – 85 = 95 degree - i) Since 25 + 65 = 90 degree, it is complementary
ii) Since 95 + 85 = 180 degree, it is supplementary.