## ML Aggarwal Class 7 Solutions for ICSE Maths Chapter 10 Lines and Angles Check Your Progress

Question 1.

Find the supplementary angle of each of the following angles:

(i) \(\frac { 1 }{ 2 }\) of 90°

(ii) \(\frac { 3 }{ 7 }\) of 280°

Solution:

Question 2.

How many degrees are there in an angle which is one-fifth of its complement?

Solution:

Question 3.

If two angles are supplementary and one angle is 5° more than four times the other, find the angles.

Solution:

Question 4.

The given diagram shows two intersecting straight lines. Find the values of x, y and z.

Solution:

Question 5.

In the given diagram, lines AB and CD intersect at O. If ∠1 + ∠3 = 78°, find the size of ∠2.

Solution:

Question 6.

(a) In the figure (i) given below, l || m. If ∠5 = 65°, find all other angles.

(b) In the figure (ii) given below, l || m. Find the values of x, y and z.

(c) In the figure (iii) given below, l || m and p || q. Find the values of x, y and z.

Solution: