Question

Pls help with math question !
thank you !!

Answer 1

42 degrees

Explanation:

All the interior angles in a triangle add up to 180 degrees. Knowing this, we can construct the following equation:

`180=84+54+a\\180=138+a`

Subtract both sides by 138

`180-138=138+a-138\\42=a`

I hope this helps!