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

In the following triangles, find the value of x - Mathematics

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Question

In the following triangle, find the value of x

Sum

Solution

Let ∠Z = (2x + 1)° and ∠Y = 90°

By the sum property of triangle we have

∠x + ∠y + ∠z = 180°

29° + 90° + (2x + 1)° = 180°

119° + (2x + 1)° = 180°

(2x + 1)° = 180° – 119°

2x + 1° = 61°

2x = 61° – 1°

2x = 60°

x = `(60^circ)/2`

x = 30°

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Chapter 4: Geometry - Exercise 4.1 [Page 73]

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Samacheer Kalvi Mathematics - Term 2 [English] Class 7 TN Board
Chapter 4 Geometry
Exercise 4.1 | Q 3. (iii) | Page 73
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