Question

Exercise 4B
1. Measure the following angles using a protractor.
(a)
(b)
(c)
(d)
А
B​

Answer 1

Explanation:

Solution.

While using a ruler, due to the incorrect position of eye, there are chances of error in the reading whereas, with ruler this error can be minimised and we can get an accurate result.

Jagranjosh

[Note: If A, B, C are any three points on a line such AC + CB = AB, then we can be sure that C lies between A and B]

Solution.

Jagranjosh

Here, AB = 5 cm and a point C lies between A and B such that

AC = 2 cm, CB = 3cm.

∴ AC + CB = 2 cm + 3 cm = 5 cm.

But, AB = 5 cm.

So, AB = AC + CB.