Download 1.4 Pairs of Angles - Garnet Valley School District

Name ___________________________________________ Date _____________________ Class ____________________
1.4 Pairs of Angles
Unit 1: Foundations for Geometry
In each box, draw an example of that pair of angles. Write in angle measures to show
important properties of each pair (if there are any).
Adjacent Angles
Linear Pair
Complementary Angles
Pairs of Angles
Supplementary Angles
Vertical Angles
Complete the statements.
1. Adjacent angles are two angles in the same plane with a common __________ and a
common __________, but no common interior points.
2. A __________ is a pair of adjacent angles whose noncommon sides are opposite rays.
3. Complementary angles are two angles whose measures have a sum of __________.
4. The kind of angle formed by the noncommon sides of two adjacent and complementary
angles is a _______________.
5. _______________ angles are two angles whose measures have a sum of 180°.
6. The kind of angle formed by the noncommon sides of two adjacent and supplementary
angles is a _______________.
Use the figure for Exercises 7 and 8.
In 2004, several nickels were minted to commemorate the Louisiana Purchase and Lewis and
Clark’s expedition into the American West. One nickel shows a pipe and a hatchet crossed to
symbolize peace between the American government and Native American tribes.
7. Name a pair of vertical angles.
____________________________________________
8. Name a linear pair of angles.
____________________________________________
Holt McDougal Geometry
Name ___________________________________________ Date _____________________ Class ____________________
Use the figures for Exercises 9 – 11.
9. supplement of ∠Z __________
10. complement of ∠Z __________
11. complement of ∠Y __________
In an equilateral triangle, all three sides have equal lengths and all three angles have equal
measures. Find the measure of the following angles.
12. supplement of ∠A __________
13. complement of ∠A __________
14. An angle measures 12 degrees less than three times its supplement. Find the measure of the
angle. __________
15. An angle is its own complement. Find the measure of a supplement to this angle. _________
16. ∠DEF and ∠FEG are complementary. m∠DEF = (3x − 4)°, and m∠FEG = (5x + 6)°.
Find the measures of both angles. __________________________________________________
17. ∠DEF and ∠FEG are supplementary. m∠DEF = (9x + 1)°, and m∠FEG = (8x + 9)°.
Find the measures of both angles. __________________________________________________
18. ∠ABC and ∠CBD form a linear pair and have equal measures. Tell if ∠ABC is acute, right,
or obtuse.
_____________________________________
19. ∠KLM and ∠MLN are complementary. LM bisects ∠KLN. Find the measures of ∠KLM
and ∠MLN.
_____________________________________
Holt McDougal Geometry