Book: NCERT - Mathematics
Chapter: 3. Understanding Quadrilaterals
Subject: Maths - Class 8th
Q. No. 1 of Exercises 3.2
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1
Find x in the following figures.
A. 
B. 
We know that the sum of all exterior angles of polygon = 360o
Therefore,
A. 125° + 125° + x = 360°
250° + x = 360°
x = 110°
B. 60° + 90° + 70° + x + 90° = 360°
310° + x = 360°
x = 50°
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