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The exterior angle value is $110^\circ$ and any one of the interior opposite angle values is $30^\circ$, then find the value of the remaining angles of the triangle.

Last updated date: 19th Sep 2024
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Hint:
Here we will first find the value of another interior angle by using the concept of the exterior angle property of the triangle. Then by using the sum of the angles of the triangle, we will find out the value of the third angle of the triangle.

Complete step by step solution:
It is given that the exterior angle of a triangle is $110^\circ$ and one of the interior opposite angles is $30^\circ$.
So we will draw the diagram of the triangle using the given information.

Then by using the concept of the exterior angle property of the triangle, we get
$\angle A + \angle B = 110^\circ$
It is given that the angle A is $30^\circ$. Then by putting the value of A in the above equation, we get
$\Rightarrow 30^\circ + \angle B = 110^\circ$
Subtracting $30^\circ$ from both sides, we get
$\Rightarrow \angle B = 110^\circ - 30^\circ$
$\Rightarrow \angle B = 80^\circ$
We know that the sum of all the angles of a triangle is equal to $180^\circ$. Therefore, we get
$\angle A + \angle B + \angle C = 180^\circ$
By putting the value of angle A and angle B, we get
$\Rightarrow 30^\circ + 80^\circ + \angle C = 180^\circ$
$\Rightarrow 110^\circ + \angle C = 180^\circ$
$\Rightarrow \angle C = 180^\circ - 110^\circ$
$\Rightarrow \angle C = 70^\circ$
Hence, the value of the remaining angles of the triangle is $80^\circ$ and $70^\circ$.