We think you have liked this presentation. If you wish to download it, please recommend it to your friends in any social system. Share buttons are a little bit lower. Thank you!
Presentation is loading. Please wait.
Published byBenjamin Jensen
Modified over 5 years ago
Circles Yes I know we did this yesterday
Circumference Posh name for the perimeter of a circle Measured in normal units of length cm etc. But how do I work it out?
Glad you asked. First we need to remember the basics Radius pl. radii diameter
Get to the point. Circumference = 2πr (r = radius) = πd (d = diameter) π (pi) = 3.1416……… (goes on forever) Yes just like someone else
One for you to try C = 2 x π x r = 2 x π x 6 = 12 π = 37.7cm (to 1 d.p.) 6cm
So what about area? Measured in square units Area = πr 2 (π x radius x radius)
Example Area = π x 5 2 = 25π = 78.5 cm 2 (to 1 d.p.) 5cm
C=π d C=2πr r=½d d=rx2 A=πr² The diameter is the longest chord. The ratio of the circumference is always …. π is a Greek letter. π can also.
1.7 Introduction to Perimeter, Circumference, & Area p. 51.
Level 7 Surface Area - Cuboid and Cylinder 28-Mar-17
Find the circumference of the following circles: (Write the formula that you will use.)
Geometry Formulas: Surface Area & Volume.
Area and Circumference of Circles. 1. Radius- any line segment that connects the center to a point on the circle VOCABULARY Radius.
Surface Area of Cylinders.
Lessons 6.5 Circumference and 8.5 Area of a Circle
It looks like this,… Not like this,…
10.1 Circles and Circumference
Using Radius to Find Circumference
Circles 9.3 Page 532 DiameterIs a segment that passes through the center of the circle and has endpoints on the circle. Segment AC is the diameter. D =
Definition: A circle is the set of all points on a plane that is a fixed distance from the center.
Perimeter Rectangles, Squares, and Triangles Perimeter Measures the distance around the edge of any flat object. To find the perimeter of any figure,
Circles: Area and Circumference. Definitions Circumference: Distance around the outside of a circle Area: How many squares it takes to cover a circle.
investigate the relationship between the diameter and circumference of a circle.
Circumference & Area of Circles Unit 5-3. Circumference Formula for Circumference: ** r is the radius ** ** 2r = d. d is the diameter. ** **Circumference.
Math Circumference of Circles & Area of Circles. Vocabulary A circle is the set of all points in a plane that are the same distance from a given point,
The Circle Introduction to circles Let’s investigate… Circumference
© 2019 SlidePlayer.com Inc. All rights reserved.