Question

a triangle has interior angle measures of 43°, 40°, and u. what is the value of u?

Explanation:

Step1: Recall angle - sum property

The sum of interior angles of a triangle is 180°. So, 43° + 40°+u = 180°.

Step2: Simplify the left - hand side

43 + 40=83, so the equation becomes 83°+u = 180°.

Step3: Solve for u

u = 180° - 83°.
u = 97°

Answer:

97