Question

complete the sentences with words from the box. straight angle angle bisector vertical angles adjacent angles angle congruent angles obtuse angle complementary angles acute angle supplementary angles 1. angles formed by intersecting lines are __________ 2. an angle that is greater than 0° and less than 90° is an ________ 3. two angles that have a common vertex and a common ray are called ________ 4. an angle that is equal to 180° is called a ________ 5. a geometric figure formed by two rays with a common endpoint is an ________ 6. a pair of angles whose measures have a sum of 90° are called ________ 7. a ray that divides an angle into two congruent angles is an ________ 8. a pair of angles whose measures have a sum of 180° are called ________ 9. an angle that is greater than 90° and less than 180° is an ________ 10. angles that have the same measure are called __________

Explanation:

1. When lines intersect, vertical angles are formed.
2. By definition, an angle between 0° and 90° is an acute angle.
3. Adjacent angles share a common vertex and a common ray.
4. A straight - angle measures 180°.
5. An angle is formed by two rays with a common endpoint.
6. Complementary angles have a sum of 90°.
7. An angle bisector divides an angle into two congruent angles.
8. Supplementary angles have a sum of 180°.
9. An angle between 90° and 180° is an obtuse angle.
10. Congruent angles have the same measure.

Answer:

1. vertical angles
2. acute angle
3. adjacent angles
4. straight angle
5. angle
6. complementary angles
7. angle bisector
8. supplementary angles
9. obtuse angle
10. congruent angles