Determine the measure of the angle ∠y.
degrees

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Solution

All the given angles are exterior angles of the triangle.

We know that the sum of all the exterior angles of a triangle is $360^{o} .$

$\Rightarrow ∠ y + 75^{o} + 120^{o} = 360^{o}$
$\Rightarrow ∠ y = 360^{o} - 75^{o} - 120^{o} = 165^{o}$

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Determine the measure of the angle ∠y. degrees ​​​​​​​

All the given angles are exterior angles of the triangle. We know that the sum of all the exterior angles of a triangle is 360o. ⇒∠y+75o+120o=360o ⇒∠y=360o−75o−120o=165o

Determine the measure of the angle ∠y.
degrees

All the given angles are exterior angles of the triangle.

We know that the sum of all the exterior angles of a triangle is $360^{o} .$

$\Rightarrow ∠ y + 75^{o} + 120^{o} = 360^{o}$
$\Rightarrow ∠ y = 360^{o} - 75^{o} - 120^{o} = 165^{o}$