Exercise 18B.1 Questions 1, 2, 3, 6 All EXERCISE 18B.1 1 Using 7 3.14, find the circumference of: 5 cm 8 m 1.1 km 3'm 2 Find the circumference of a circle of: a diameter 8.5 cm 6 diameter 11.3 m c radius 2.45 km 3 A cylindrical tank has radius 1.5 m. What is the circumference of its base? 6 Find the perimeter of: b 8 m 20 cm 12 m 10 cm

Elementary Geometry For College Students, 7e
7th Edition
ISBN:9781337614085
Author:Alexander, Daniel C.; Koeberlein, Geralyn M.
Publisher:Alexander, Daniel C.; Koeberlein, Geralyn M.
ChapterP: Preliminary Concepts
SectionP.CT: Test
Problem 1CT
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Exercise 18B.1 Questions 1, 2, 3, 6 All
EXERCISE 18B.1
1 Using 7 3.14, find the circumference of:
5 cm
8 m
1.1 km
3'm
2 Find the circumference of a circle of:
a diameter 8.5 cm
b diameter 11.3 m
c radius 2.45 km
3 A cylindrical tank has radius 1.5 m. What is the circumference of its base?
6 Find the perimeter of:
8 m
20 cm
12 m
10 cm
Transcribed Image Text:Exercise 18B.1 Questions 1, 2, 3, 6 All EXERCISE 18B.1 1 Using 7 3.14, find the circumference of: 5 cm 8 m 1.1 km 3'm 2 Find the circumference of a circle of: a diameter 8.5 cm b diameter 11.3 m c radius 2.45 km 3 A cylindrical tank has radius 1.5 m. What is the circumference of its base? 6 Find the perimeter of: 8 m 20 cm 12 m 10 cm
FINDING THE DIAMETER OR RADIUS
If we are given the circumference of a circle we can calculate its diameter and radius.
Example 3
| Self Tutor
What is the diameter of a circular pond with circumference 100 m?
Td = C
Td = 100
100
d =
{dividing both sides by 7}
dz 31.8
{100 E
}
So, the diameter is about 31.8 m.
Exercise 18B.2 Questions 1 & 2 All
EXERCISE 18B.2
1 Find the diameter of a circle with circumference:
a 10 m
b 50 cm
c 5 km
2 Find the radius of a circle with circumference:
a 80 cm
6 25.6 m
c 3.842 km
Transcribed Image Text:FINDING THE DIAMETER OR RADIUS If we are given the circumference of a circle we can calculate its diameter and radius. Example 3 | Self Tutor What is the diameter of a circular pond with circumference 100 m? Td = C Td = 100 100 d = {dividing both sides by 7} dz 31.8 {100 E } So, the diameter is about 31.8 m. Exercise 18B.2 Questions 1 & 2 All EXERCISE 18B.2 1 Find the diameter of a circle with circumference: a 10 m b 50 cm c 5 km 2 Find the radius of a circle with circumference: a 80 cm 6 25.6 m c 3.842 km
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