Sum of angles in triangle =180^o ∴∠ A+ ∠ B+ ∠ C=180^o ⇒∠ A+60+60=180^o ⇒∠ A=60^o Now x+ ∠ A =180 [Linear Angle] ∴ x=180 60=120^o ...

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Exterior Angle of a Triangle and Its Property

Find ∠ x = ...

Question

Find $∠ x = ?$

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Solution

Sum of angles in triangle $= 180^{o}$
$∴ ∠ A + ∠ B + ∠ C = 180^{o}$
$\Rightarrow ∠ A + 60 + 60 = 180^{o}$
$\Rightarrow ∠ A = 60^{o}$
Now $x + ∠ A = 180$ [Linear Angle]
$∴ x = 180 - 60 = 120^{o}$

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