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Tamil Nadu Board of Secondary EducationSSLC (English Medium) Class 7

Given that AB is a straight line. Calculate the value of x° in the following cases - Mathematics

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Question

Given that AB is a straight line. Calculate the value of x° in the following cases

Sum
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Solution

Since the angles are linear pair

∠AOC + ∠BOC = 180°

3x° + 42° = 180°

3x° = 180° − 42° 

3x° = 138°

x° = `(138^circ)/3` = 46°

x° = 46° 

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Chapter 5: Geometry - Exercise 5.1 [Page 92]

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Samacheer Kalvi Mathematics - Term 1 [English] Class 7 TN Board
Chapter 5 Geometry
Exercise 5.1 | Q 4. (ii) | Page 92
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