Download presentation
Presentation is loading. Please wait.
Published byCameron McDonald Modified over 8 years ago
1
CHAPTER 10.1 CIRCLES AND CIRCUMFERENCE
2
A circle is the set of all points in plane equidistant from a given point called the center of the circle CIRCLES
3
CONCEPT
4
EXAMPLE 1 Identify Segments in a Circle A. Name the circle and identify a radius.
5
EXAMPLE 1 Identify Segments in a Circle B. Identify a chord and a diameter of the circle.
6
EXAMPLE 1 A. Name the circle and identify a radius. A. B. C. D.
7
EXAMPLE 1 B. Which segment is not a chord? A. B. C. D.
8
CONCEPT
9
EXAMPLE 2 Find Radius and Diameter Answer: QV = 10.5 cm If RT = 21 cm, what is the length of QV? RT is a diameter and QV is a radius.
10
EXAMPLE 2 A.12 cm B.13 cm C.16 cm D.26 cm If QS = 26 cm, what is the length of RV?
11
CONCEPT
12
EXAMPLE 3 Find Measures in Intersecting Circles
13
EXAMPLE 3 A.3 in. B.5 in. C.7 in. D.9 in.
14
CONCEPT
15
EXAMPLE 4 Find Circumference CROP CIRCLES A series of crop circles was discovered in Alberta, Canada, on September 4, 1999. The largest of the three circles had a radius of 30 feet. Find its circumference. Answer: The circumference of the crop circle is 60 feet or about 188.50 feet.
16
EXAMPLE 4 A.377.0 feet B.392.5 feet C.408.3 feet D.422.1 feet The Unisphere is a giant steel globe that sits in Flushing Meadows-Corona Park in Queens, New York. It has a diameter of 120 feet. Find its circumference.
17
EXAMPLE 5 Find Diameter and Radius Find the diameter and the radius of a circle to the nearest hundredth if the circumference of the circle is 65.4 feet.
18
EXAMPLE 5 A.8.4 m B.5.35 m C.2.67 m D.16.8 m Find the radius of a circle to the nearest hundredth if its circumference is 16.8 meters.
19
EXAMPLE 6 Circumference of Circumscribed Polygon
20
EXAMPLE 6 A. B. C. D.
Similar presentations
© 2025 SlidePlayer.com. Inc.
All rights reserved.