Question

If the measure of angle 5 is 128 degrees, what is the measure of angle 3? Make sure to justify your steps. help will mark you brainliest!!

Answer 1

52

According to the figure, the angles 5 and 7 are correspondent angles, so we can write:

$\begin{gathered} m\angle5=m\angle7=128 \\ 128+m\angle3=180 \\ m\angle3=52 \end{gathered}$

Since angle 3 and angle 7 their sum is 180º then we can subtract and find the measure of angle 3.