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20% of an angle is the supplement of 60°. Find the angle. - Mathematics

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Question

20% of an angle is the supplement of 60°. Find the angle.

Sum

Solution

Let the angle = x

20% of x.

`20/100 xx "x"` = 120°

x = `120 xx 100/20`

x = 600°

Supplement of 60°

= 180° - 60° = 120°

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Concept for Pairs of Angles
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Chapter 14: Lines and Angles (Including Construction of angles) - Exercise 14 (A)

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Selina Concise Mathematics [English] Class 7 ICSE
Chapter 14 Lines and Angles (Including Construction of angles)
Exercise 14 (A) | Q 18
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