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Name _______________________________________ Date __________________ Class __________________
1.4 Practice A
Pairs of Angles
Draw your answer in the space provided.
1. Sketch 1 and 2 so that
they are adjacent angles.
2. Sketch 1 and 2 so that
they form a linear pair.
3.Sketch 1 and 2 so that
they are vertical angles.
In an equilateral triangle, all three sides have equal lengths
and all three angles have equal measures. Find the measure
of the following angles.
4. supplement of A __________
5. complement of A __________
Use the figure for Exercises 6 and 7.
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.
6. Name a pair of vertical angles.
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7. Name a linear pair of angles.
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8. ABC and CBD form a linear pair and have
equal measures. Tell if ABC is acute, right,
or obtuse.
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Holt McDougal Geometry
Name _______________________________________ Date __________________ Class __________________
9.KLM and MLN are complementary. LM
bisects KLN. Find the measures of KLM
and MLN.
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10. An angle measures 12 degrees less than three times its supplement. Find the
measure of the angle. __________
11. An angle is its own complement. Find the measure of a supplement to this angle.
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12. DEF and FEG are complementary. mDEF  (3x  4), and mFEG  (5x  6).
Find the measures of both angles. _____________________________________________
13. DEF and FEG are supplementary. mDEF  (9x  1), and mFEG  (8x  9).
Find the measures of both angles. _____________________________________________
Original content Copyright © by Holt McDougal. Additions and changes to the original content are the responsibility of the instructor.
Holt McDougal Geometry