0
Upcoming SlideShare
×

Thanks for flagging this SlideShare!

Oops! An error has occurred.

×
Saving this for later? Get the SlideShare app to save on your phone or tablet. Read anywhere, anytime – even offline.
Standard text messaging rates apply

Surface Area (ORANGE THEME)

384

Published on

This PPT features a well explained theory / concepts / derivations of the formula of Surface Area of various 3D shapes : like cube, cuboid and cylinder with the help of expanded 3D shapes (called …

This PPT features a well explained theory / concepts / derivations of the formula of Surface Area of various 3D shapes : like cube, cuboid and cylinder with the help of expanded 3D shapes (called "nets").

NOTE:

0 Likes
Statistics
Notes
• Full Name
Comment goes here.

Are you sure you want to Yes No
• Be the first to comment

• Be the first to like this

Views
Total Views
384
On Slideshare
0
From Embeds
0
Number of Embeds
1
Actions
Shares
0
7
0
Likes
0
Embeds 0
No embeds

No notes for slide

Transcript

• 1. This shows that the outer surface of a cube is made up of six squares but in fact they are the faces of cube. So, Surface area of cube = Area of all six squares Surface area of cube = a2 + a2 + a2 + a2 + a2 + a2 Surface area of cube = 6a2
• 2. This shows that the lateral or curved surface of a cube is made up of four squares. So, Lateral or curved surface area of cube = Area four squares Lateral or curved surface area of cube = a2 + a2 + a2 + a2 Lateral or curved surface area of cube = 4a2
• 3. This shows that the outer surface of a cuboid is made up of six rectangles but in fact they are the faces of cuboid. So, Surface area of cuboid = Area of all six rectangles Surface area of cuboid = (lb)+(lb)+(bh) +(bh) + (hl) +(hl) Surface area of cuboid = 2(lb)+2(bh)+2(hl) Surface area of cuboid = 2(lb+bh+hl)
• 4. This shows that the lateral or curved surface of a cuboid is made up of four rectangles. So, Lateral or curved surface area of cuboid = Area of four rectangles Lateral or curved surface area of cuboid =(bh)+(bh)+(hl)+(hl) Lateral or curved surface area of cuboid = 2(bh)+2(hl) Surface area of cuboid = 2(l+b)h
• 5. This shows that the outer surface of a cylinder is made up of one rectangle and two circles. So, Surface area of cylinder = Area of rectangle + Area of two Circles Surface area of cylinder = 2 ‫ת‬rh + ( ‫ת‬r2 + ‫ת‬r2 ) Surface area of cylinder = 2 ‫ת‬rh + 2(‫ת‬r2) Surface area of cuboid =2 ‫ת‬r(r+h) ‫ת‬ ‫ת‬
• 6. This shows that the lateral or curved surface of a cylinder is made up of one rectangle. So, Lateral/curved surface area of cylinder = Area of rectangle Lateral/curved surface area of cylinder = 2 ‫ת‬rh ‫ת‬ ‫ת‬
• 7.    