Practice 8-5 Answer Key

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Name
Practice
8-5
Quadrilaterals
Classify each quadrilateral. Be as specific as possible.
6 cm
1.
18 cm
15 cm
2.
8 cm
18 cm
8 cm
15 cm
20 cm
Trapezoid
8 in.
3.
Rectangle
17 cm
4.
4 in.
4 in.
17 cm
17 cm
8 in.
Parallelogram
Rhombus
For 5 and 6, the measures of three angles of a quadrilateral are
given. Find the measure of the fourth angle.
5. 90°, 145°, 78°,
47°
6. 110°, 54°, 100°,
7. Name the vertices of the square to the right.
F
G
L
A
96°
F, G, A, L
8. Three of the angles of a quadrilateral measure
80°, 100°, and 55°. Which is the measure of the
fourth angle?
A 115°
B 120°
C 125°
D 130°
9. Explain It Can a trapezoid have four obtuse angles? Explain.
Sample answer: The figure would not
be able to close the fourth side if all of
the angles were obtuse.
62
Topic 8
© Pearson Education, Inc. 5
Practice 8-5
17 cm
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