Question

find the value of x.

Explanation:

Step1: Recall angle - sum property

The sum of interior angles of a triangle is 180°. So, 30° + 80°+x° = 180°.

Step2: Simplify the left - hand side

30 + 80+x=180, which gives 110 + x=180.

Step3: Solve for x

Subtract 110 from both sides: x = 180 - 110.

Answer:

70