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

Find the value of z - Mathematics

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Question

Find the value of z

Sum

Solution

The sum of angles at a point is 360°.

∴ ∠QOP + ∠PON + ∠NOM + ∠MOQ = 360°

3z + (2z – 5) + (z + 10) + (4z – 25) = 360°

3z + 2z + z + 4z – 5 + 10 – 25 = 360°

10z – 20° = 360°

10z – 20° + 20° = 360° + 20°

10z = 380°

z = `(380^circ)/10`

z = 38°

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Chapter 5: Geometry - Exercise 5.6 [Page 106]

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Samacheer Kalvi Mathematics - Term 1 [English] Class 7 TN Board
Chapter 5 Geometry
Exercise 5.6 | Q 12 | Page 106
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