Question

Could you explain to me on what to do for this question

Answer 1

1. First you need to know the value of the three internal angles in the triangle:

The mising thriangle cam be find as follow:

The angle in green is 180º

You have the value of a part of that angle (6+25x) then the other part of the angle is:

`180º-(6+25x)=180º-6-25x=174º-25x`

Then you have the three internan angles:

44

18x-3

174-25x

You must know that the internal angles of a triangle always gonna sum 180º, then:

`180=44+(18x-3)+(174-25x)`

You can clear the x, as follow:

`180=44+18x-3+174-25x`
`180=215-7x`

Then so, x=5