Question

Match the following:

• A. ${90}^{\circ }$
• B. ${60}^{\circ }$
• C. ${130}^{\circ }$
• D. ${180}^{\circ }$

Answer 1

1. An angle whose measure is between 0${}^{\circ }$ and 90${}^{\circ }$ is called an acute angle.
2. An angle whose measure is greater than 90${}^{\circ }$ but less than 180${}^{\circ }$ is called an obtuse angle.
3. The angle whose measure is equal to 90${}^{\circ }$ is called a right angle.
4. The angle whose measure is equal to 180${}^{\circ }$ is called a straight angle.