Question

question
find the measure of the missing angle.
answer attempt 1 out of 2
a =
submit answer

Explanation:

Step1: Recall the sum of angles on a straight line

The sum of angles on a straight line is \(180^{\circ}\).

Step2: Set up the equation

We have \(50^{\circ}+90^{\circ}+a = 180^{\circ}\).

Step3: Solve for \(a\)

First, simplify the left - hand side: \(140^{\circ}+a=180^{\circ}\). Then, subtract \(140^{\circ}\) from both sides: \(a = 180^{\circ}-140^{\circ}\).

Answer:

\(40\)