Question

20.
60
(x + 20)
Зх
Sum of angle
measures: 180°

Answer 1

Answer: definitely x=25

Explanation:

Answer 2

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Sum of the interior angles of any triangle equal 180° .

Thus ;

`(x + 20) + 3x + 60 = 180`

`4x + 80 = 180`

Subtract sides 80

`4x + 80 - 80 = 180 - 80`

`4x = 100`

Divide sides by 4

`(4)/(4) x = (100)/(4) \\`

`x = 25`

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