Asked by anonymous
1. What is the ratio of the radii of two circles with area = 3 π square units and 75π square units?
b. What is the ratio of their circumferences?
2. What is the ratio of the sides of two trapezoids with area = 8 square units and 72 square units?
b. What is the ratio of their perimeters?
b. What is the ratio of their circumferences?
2. What is the ratio of the sides of two trapezoids with area = 8 square units and 72 square units?
b. What is the ratio of their perimeters?
Answers
Answered by
Reiny
first circle: radius r1
π r1^2 = 3π
2nd circle: radius r2
πr2^2 = 75π
divide the 2nd by the first
π r2^2/(πr1^2) = 75π/3π
r2^2 / r1^2 = 25/1
r2 : r1 = 5 : 1
#2, assuming the two traps are similar,
ratio of areas = ratio of their corresponding sides
π r1^2 = 3π
2nd circle: radius r2
πr2^2 = 75π
divide the 2nd by the first
π r2^2/(πr1^2) = 75π/3π
r2^2 / r1^2 = 25/1
r2 : r1 = 5 : 1
#2, assuming the two traps are similar,
ratio of areas = ratio of their corresponding sides
Answered by
anonymous
the answer for question 1 is wrong
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