Question

complete the sentences with words from the box. straight angle angle bisector obtuse angle complementary angles vertical angles adjacent angles acute angle supplementary angles angle congruent 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. Intersecting lines form vertical angles.
2. An angle between 0° and 90° is an acute angle.
3. Angles with a common vertex and ray are adjacent angles.
4. An angle of 180° is a straight angle.
5. Two - ray figure with a common endpoint is an angle.
6. Angles with sum 90° are complementary angles.
7. Ray dividing an angle into two congruent angles is an angle bisector.
8. Angles with sum 180° are supplementary angles.
9. An angle between 90° and 180° is an obtuse angle.
10. Angles with the same measure are congruent angles.

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