What angle measure does a semicircle have?
Check the final answer first, then review the worked steps.
Problem
What angle measure does a semicircle have?
Step-by-step solution
A semicircle is half of a circle. A full circle has an angle measure of $360^\circ$. Therefore, a semicircle has an angle measure of $360^\circ / 2 = 180^\circ$.
Answer
$180^\circ$