2. ∠3 and ∠4 form a right angle when combined. What is the relation of the two angles?
a. They are vertical angles
b. They are complementary angles
c. They are supplementary angles
d. They are right angles.
3. If two angles are congruent and the sum of their measures is equal to 100° , what is the measure of each angles?
a. Both have measures equal to 100°.
b. They measure 35° and 65°.
c. They measure 60° and 40°
d. Both have measures equal to 50°.
4. Lines that intersect and form four right angles are called ______ lines.
a. parallel
b. perpendicular
c. horizontal
d. vertical
5. The lines below do not meet even if extended infinitely in both directions. What do you call the relation of the two lines?
a. Parallel
b. Perpendicular
c. Horizontal
d. Vertical
6. What do you call a pair of angles which are adjacent and, at the same time, supplementary?
a. Straight Angle
b. Linear Pair
c. Adjacent angles
d. Vertical angles
Answers & Comments
ANSWERS:
2. B
» Two angles are said to be complementary if the sum of their measures is equal to 90° and/or form a right angle.
3. D
» Two angles are congruent if they have equal measures. Since the sum of the two angles' measures is 100°, then both angles must have a measure of 50°
4. B
» Two lines are said to be perpendicular to each other, if they form four right angles at the point of intersection.
5. A
» Parallel lines are lines that do not intersect even if they are extended infinitely in both directions.
6. B
» A linear pair is formed if two adjacent angles form a straight line, whose sum of measures is equal to 180°
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