Explanation:
An acute angle is an angle that measures less than 90º
A right angle is an angle that measures exactly 90º
A straight angle is an angle that measures exactly 180º
An obtuse angle is an angle that measures more than 90º but less than 180º
In this diagram:
Angle CAH is marked in red.
Answer:
Angle CAH measures 180º, therefore it is a straight angle
