Q. If a circle has a radius of 5 cm, what is its circumference?
A.
10π cm
B.
15π cm
C.
20π cm
D.
25π cm
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Solution
Circumference = 2πr = 2π(5) = 10π cm.
Correct Answer:
A
— 10π cm
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Q. If two angles of a triangle are 50 degrees and 60 degrees, what is the measure of the third angle?
A.
50 degrees
B.
60 degrees
C.
70 degrees
D.
80 degrees
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Solution
The sum of the angles in a triangle is 180 degrees. Third angle = 180 - 50 - 60 = 70 degrees.
Correct Answer:
C
— 70 degrees
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Q. What is the perimeter of a triangle with sides measuring 5 cm, 12 cm, and 13 cm?
A.
30 cm
B.
25 cm
C.
20 cm
D.
15 cm
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Solution
Perimeter = 5 cm + 12 cm + 13 cm = 30 cm.
Correct Answer:
A
— 30 cm
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Q. Which of the following shapes has all sides equal and all angles equal?
A.
Rectangle
B.
Square
C.
Rhombus
D.
Trapezoid
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Solution
A square has all sides equal and all angles equal (90 degrees).
Correct Answer:
B
— Square
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Q. Which of the following shapes is similar to a triangle with sides 2 cm, 3 cm, and 4 cm?
A.
4 cm, 6 cm, 8 cm
B.
2 cm, 3 cm, 5 cm
C.
1 cm, 1.5 cm, 2 cm
D.
3 cm, 4 cm, 5 cm
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Solution
Two triangles are similar if their corresponding sides are in proportion. The sides 4 cm, 6 cm, and 8 cm are double the sides of the original triangle.
Correct Answer:
A
— 4 cm, 6 cm, 8 cm
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Q. Which of the following triangles is congruent to a triangle with sides 3 cm, 4 cm, and 5 cm?
A.
3 cm, 4 cm, 6 cm
B.
5 cm, 12 cm, 13 cm
C.
6 cm, 8 cm, 10 cm
D.
3 cm, 4 cm, 5 cm
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Solution
Two triangles are congruent if they have the same side lengths. The triangle with sides 3 cm, 4 cm, and 5 cm is congruent to itself.
Correct Answer:
D
— 3 cm, 4 cm, 5 cm
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