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 byShanon Hutchinson
Modified over 6 years ago
Question 1 Which formula would be best to use to find the diameter of the following circle? C = 81 ft ?
Question 2 Now use the formula you chose to find the diameter (π≈3). Show all work! C = 81 ft ?
Question 3 Find the circumference of the circle shown below (π≈3). Show all work! 7 in.
Question 4 Find the circumference of the circle shown below (π≈3). Show all work! 128 mm
Question 5 What does “pi” mean? Don’t just give the value, explain the reasoning for why we have the value known as pi.
Answer Key 1.C = πd 2.27 feet 3.42 in. 4.384 mm 5.Pi is the ratio of the circumference to the diameter for any circle.
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.
Objective: Find the circumference and area of circles.
Area and Circumference of Circles. 1. Radius- any line segment that connects the center to a point on the circle VOCABULARY Radius.
Using Radius to Find Circumference
EXAMPLE 1 Use the formula for circumference Find the indicated measures. Write circumference formula. Substitute 9 for r. Simplify. Use a calculator. =
Circles Learn to find the area and circumference of circles.
Area and Circumference of Circles
Circles & Circumference 8 th Grade Pre-Algebra Circles & Circumference PPT Molly Thompson.
1. 2 Circle A circle is the set of all points that are the same distance from a given point called the center.
Circles: Area and Circumference. Definitions Circumference: Distance around the outside of a circle Area: How many squares it takes to cover a circle.
3.4 Area and Circumference 1 Circle A circle is a plane figure that consists of all points that lie the same distance from a fixed point. The fixed point.
Circumference & Area of Circles Unit 5-3. Circumference Formula for Circumference: ** r is the radius ** ** 2r = d. d is the diameter. ** **Circumference.
Circumference & Pi 3.14.
Circumference and Area: Circles
Warm-Up Multiply. 1.89 x 97 x 76 x 34 4.38 x 28.
Circumference and Area of a Circle. Diameter Radius centre What is the formula relating the circumference to the diameter?
Chapter 10 Test Formula Review. Find the circumference of a circle with a diameter of 10. Identify the formula needed for the following questions.
Materials Reminders. Get out your agenda if you see your name below. You need to come to my room tomorrow. Period 2Period 7.
8.7 Circumference and Area of Circles. Definition A circle is the set of all points in a plane that are the same distance from a given point, called.
Circumference and Areas of Circles Lesson 11.5 Geometry Honors Objective: Know and use the formulas for the Circumference and Areas of Circles.
© 2021 SlidePlayer.com Inc. All rights reserved.