3d shapes

Question 1

Surface area of cylinder

Answer 1

SA = 2πr^2 + 2πrh

Question 2

Surface area of cone

Answer 2

SA= πr^2 + πrl

Question 3

Surface area of rectangular pyramid

Answer 3

SA= Lw+2bs

Question 4

Surface area of square pyramid

Answer 4

SA=b^2+2bs

Question 5

Surface area of triangular pyramid

Answer 5

SA=(1/2) bh + (1/2)ps

Question 6

Surface area of hexagonal pyramid

Answer 6

SA=3ab + 3bs

Question 7

Surface area of sphere

Answer 7

SA=4πr^2

Question 8

Volume of cylinder

Answer 8

V = πr^2h

Question 9

Volume of cone

Answer 9

V=πr^2 h/3

Question 10

Volume of rectangular pyramid

Answer 10

V=1/3 Lwh

Question 11

Volume of square pyramid

Answer 11

V=1/3 b^2h

Question 12

Volume of hexagonal pyramid

Answer 12

V = √3/2 b^2 h

Question 13

Volume of triangular pyramid

Answer 13

1/6 bhh

Question 14

Volume of sphere

Answer 14

V=4/3 πr^3

Question 15

Circumfrance —-> radius

Answer 15

C=2πr

Question 16

Finding slant height

Answer 16

S^2= H^2 +r^2

Question 17

Finding height

Answer 17

H^2= S^2 - r^2