Question

Find the value of x. Th angles on a triangle .Please explain your method.

Answer 1

Solving:

The internal values of all triangles are worth 180°, so knowing this, just form a 1st degree equation to respond, remembering that the value 180°, will stay after the equal sign of the equation.

A)

`\sf x+125^(\circ)+80^(\circ)=180\\\\\\\sf x+205=180\\\\\\\sf x=180-205\\\\\\\boxed{\sf x=-25^(\circ)}`

B)

`\sf x+68^(\circ)+318^(\circ)=180\\\\\\\sf x+386=180\\\\\\\sf x=180-386\\\\\\\boxed{\sf x=-206^(\circ)}`

Okay?!