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Unit 8 Practice A
By Kattie Castineyra
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Last updated over 1 year ago
10 questions
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Question 1
1.
Find the
approximate
circumference of a circle with a radius of 10 inches.
Note: C = 3.14
d
10 in
31.4 in
62.8 in
314.2 in
1578.4 in
Question 2
2.
Find the
exact
area of a circle with a diameter of 15 meters.
Note: A = 𝜋r
2
7.5𝜋 meters
15𝜋 meters
30𝜋 meters
56.25𝜋 meters
62.5𝜋 meters
Question 3
3.
Give the most specific name for line AE in the picture below.
chord
point of tangency
radius
tangent
secant
Question 4
4.
Identify a radius in the picture below.
segment DB
line AE
segment AC
segment AB
segment AG
Question 5
5.
Find the length of minor arc PQ in circle R with a diameter of 9 yards.
Use a calculator to round your answer to the nearest tenth of a yard.
Note: Arc Length = (
central angle
/
360
) 𝜋
d
2.6 yards
3.5 yards
5.9 yards
6.7 yards
25.8 yards
Question 6
6.
Find the measure of arc JL and identify the arc as a major arc, minor arc, or semi-circle.
Question 7
7.
Determine whether segment AB is tangent to circle C. Give justification for your answer by showing your work.
Note: a
2
+ b
2
= c
2
visibility
View drawing
Question 8
8.
Find the area of the sectors formed by the obtuse angle DFE.
Use a calculator to round to the nearest tenth.
Note: sector area = (
central angle
/
360
) 𝜋r
2
Question 9
9.
Determine the length of AB. Show your work for full credit.
Note: Tangents are congruent.
visibility
View drawing
Question 10
10.
Determine the measure of minor arc CB. Show your work for full credit.
Note: Arc AD is congruent to arc DB in the diagram. Once you solve for x, you still need to determine the measure of arc CB.
visibility
View drawing