Question

a triangle has interior angle measures of 30°, 31°, and y. what is the value of y?

Explanation:

Step1: Recall angle - sum property

The sum of interior angles of a triangle is 180°. So, 30° + 31°+y = 180°.

Step2: Simplify the left - hand side

30 + 31=61, so the equation becomes 61 + y=180.

Step3: Solve for y

Subtract 61 from both sides: y = 180 - 61.
y = 119.

Answer:

119