1 / 5

Changing the subject of a formula

Monday, 21 October 2019. Changing the subject of a formula. The formula for the area of a rectangle is: Area = Length X Width A = L X W A = LW. The letter a the front is called the SUBJECT of the formula. Area = Length X Width A = L X W A = LW. Area = 15 (cm 2 ).

hereford
Download Presentation

Changing the subject of a formula

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. Monday, 21 October 2019 Changing the subject of a formula The formula for the area of a rectangle is: Area = Length X Width A = L X W A = LW The letter a the front is called the SUBJECT of the formula

  2. Area = Length X Width A = L X W A = LW Area = 15 (cm2) What is the width? Length = 5 (cm) A = L X W 15 = 5 X W 15 = 5 X 3 So the width is 3 (cm)

  3. Area = 15 (cm2) How did you do that? To find the width, I divided 15 by 5 15 ÷ 5 = 3 Length = 5 (cm) W = Area ÷ Length W = A ÷ L W = A/L A = L X W A = LW

  4. Another formula can be found for the LENGTH Area = 15 (cm2) Width = 3 (cm) A = L X W A = LW Length = 5 (cm) W = Area ÷ Length W = A ÷ L W = A/L L = Area ÷ Width L = A ÷ W L = A/W

  5. Here are the three formulae for a rectangle A is the subject A = L X W A = LW W is the subject L is the subject W = Area ÷ Length W = A ÷ L W = A/L L = Area ÷ Width L = A ÷ W L = A/W

More Related