Question

I need help with angles in a triangle to find x
I need help with these. please :(

Answer 1

`a. \: \: x = {60}^(o)`

`b. \: \: x = {24}^(o)`

Explanation:

Hint :

Sum of angles = 180°

Simplify :

`a. \: \: {x}^(o) + {40}^(o) + {80}^(o) = {180}^(o)`

`{x}^(o) + {120}^(o) = {180}^(o)`

`{x}^(o) = {180}^(o) - {120}^(o)`

`{x}^(o) = {60}^(o)`

`b. \: 96+(x+12)+2x=180`

`x+108+2x=180`

`3x+108=180`

`3x=180−108`

`3x=72`

`x = (72)/(3)`

`x = 24`

Hope it is helpful...