1 / 16

Mastering Perimeter and Circumference Formulas

Understand how to calculate perimeters and circumferences of shapes with clear formulas for rectangles, squares, polygons, and circles. Practice problems included.

ian-nixon
Download Presentation

Mastering Perimeter and Circumference Formulas

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Perimeter & Circumference Return to table of contents

  2. Perimeter Definition: The distance around a two-dimensional figure. l w w l Note: (l) represents the Length, or longer side of the rectangle. (w) represents the Width, or shorter side of the rectangle. If no units are given, use "u".

  3. Perimeter (P) of a rectangle is found by solving the following formula: P = 2l + 2w Perimeter (P) of a square is found by doing four (4) times Side (s): P = 4s S Perimeter of a polygon is the sum of the lengths of the sides.

  4. 56 What is the Perimeter (P) of the following rectangle? 15 ft. 6 ft.

  5. 57 What is the Perimeter (P) of the square below? 7

  6. 58 What is the Perimeter (P) of the figure? 8 in

  7. 59 What is the Perimeter (P) of the figure? 8 cm 10 cm 3 cm 12 cm

  8. Circumference Definition: The outer boundary of a circle; the "perimeter" of the circle. Circumference Diameter

  9. The circumference (C) of a circle is found by using one of the following formulas: C = d or C = 2r or 2r C =

  10. C = d or C = 2r Diameter (d): Any straight line segment that passes through the center point of the circle, whose endpoints are on the circle. Radius (r): Any line segment from the center point of the circle, to any point on the circle---radius is 1/2 of the Diameter. oi of the circle, to any point on the circle---radius is 1/2 of the Diameter.

  11. C = d or C = 2r Pi (  ), a mathematical constant, is the ratio of a circle's circumference to its diameter. Note:

  12. 60 What is the Circumference (C) of a circle with a radius (r) of 7cm? (Use 3.14 for π) 7 cm

  13. 61 What is the Circumference (C) of a circle with a Diameter (D) of 11in.? (Use 3.14 for π) 11 in.

  14. 62 Find the circumference of a circle whose radius is 2.5 meters. (Use 3.14 for π)

  15. 63 A circle has diameter 8 yds. What is its circumference? (Use 3.14 for π)

  16. 64 The circumference of a circle is 37.68 cm. What is its radius? (Use 3.14 for π)

More Related