Mathematics
Grade9
Easy
Question
The measure of angle 
is _______.
- 70o
- 130o
- 60o
- 50o
Hint:
In this question, we have to find the angle A. As we know that 
A = 1 as both are consecutive angles . so, we will first find the value of 1 , as n is a straight line so the sum of the angles will be 180
. Now we can easily find the value of A.
The correct answer is: 50o
As m is a straight line so,
130 + 1 =180
1 =180- 130 =50
Now, as m and n are parallel lines with r as transversal
so, A = 1 = 50 (consecutive angles)
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