Download presentation

Presentation is loading. Please wait.

Published bySalvatore Ming Modified over 2 years ago

1
By: Ashley, Kelsey, Devin, Jarred, Shaq

2
Surface area formula SA=4πr^2 Finding a radius EX. SA=30in plug it back into formula SA=4πr^2 30in=4πr^2 divide by 4π to both sides 2.38in=r^2 then your Square root 2.38in=√r^2 R=1.55in Now plugging it back into the formula to find SA SA=4πr^2 SA=4π(1.55in)^2 SA=30in^2 Remember to square your units cause its SA

3
Volume Formula V=4/3πr^3 Finding the radius EX. V=60cm V=4/3πr^3 Plug in 60 for V 60cm=4/3πr^3 Divide by 4/3π to both sides 14.3239cm=r^3 Then you Cube root 2.42cm=r Plugging It back in. V=4/3πr^3 V=4/3π(2.42)^3 V=60 And remember if you have a diameter of 16 or any number to find radius just divide by 2

4
MM2G4B Determining the effect on surface area and volume of changing the radius of a sphere.

5
Surface area When you double the radius the surface area changes by a multiple of 4 So, when you triple the radius the surface area changes by a multiple of 9 Double (2) radius X4 Triple (3) radius X9

6
Volume If you double the radius the volume changes to a multiple of 8 So, if you triple the radius the volume changes to a multiple of 27 Double (2) radius X8 Triple (3) radius X27

7
Examples of surface area SA=4πr² R=1 SA=4π(1)² SA=4π1 SA=4π SA=12.6 Double it R=2 SA=4π(2)² SA=4π4 SA=16π SA=50.3 12.6 x 4 SA=50.4

8
Examples of Volume V=4πr³/3 R=4 V=4π(4)³/3 V=85.3 Double it r=8 V=4π(8)³/3 V=682.7 V=85.3 x 8=682.4

Similar presentations

© 2017 SlidePlayer.com Inc.

All rights reserved.

Ads by Google

Ppt on e movie ticket booking system Download ppt on pulse code modulation ppt Ppt on hydro power plant Ppt on 4-stroke petrol engine Ppt on induced abortion Ppt on disaster management download Ppt on narendra modi free download Ppt on steel structures in india Ppt on causes of road accidents Projector view ppt on android