Question

Find the value of
�
xx in the triangle shown below.

Answer 1

72

Explanation:

first of all, triangles have 180 degrees if you combine all the angles

31+77=108

180-108=72

Answer 2

• 
  `\bf x=72^o`

Explanation:

The three angles in a triangle add up to 180:-

`\bf x+31+77=180^o`

`\bf x= 180-77-31`

`\bf x=72^o`

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Hope this helps!