Mensuration/Coordinate geometry

Question 1

What is Heron’s formula for the area of a triangle?

Answer 1

[s(s-a)(s-b)(s-c)]^1/2

Question 2

What is the area of an equilateral triangle?

Answer 2

√3/4*a^2

Question 3

What is the volume of a cube?

Answer 3

a^3

Question 4

What is the curved surface area (C.S.A) of a cube?

Answer 4

4a²

Question 5

What is the total surface area (T.S.A) of a cube?

Answer 5

6a²

Question 6

What is the volume of a cuboid?

Answer 6

lbh

Question 7

What is the curved surface area (C.S.A) of a cuboid?

Answer 7

2h(l+b)

Question 8

What is the total surface area (T.S.A) of a cuboid?

Answer 8

2(lb+bh+hl)

Question 9

What is the volume of a sphere?

Answer 9

4/3πr³

Question 10

What is the curved surface area (C.S.A) of a sphere?

Answer 10

4πr²

Question 11

What is the volume of a hemisphere?

Answer 11

2/3πr³

Question 12

What is the curved surface area (C.S.A) of a hemisphere?

Answer 12

2πr²

Question 13

What is the total surface area (T.S.A) of a hemisphere?

Answer 13

3πr²

Question 14

What is the volume of a cylinder?

Answer 14

πr²h

Question 15

What is the curved surface area (C.S.A) of a cylinder?

Answer 15

2πrh

Question 16

What is the total surface area (T.S.A) of a cylinder?

Answer 16

2πr(r+h)

Question 17

What is the volume of a cone?

Answer 17

1/3πr²h

Question 18

What is the curved surface area (C.S.A) of a cone?

Answer 18

πrl

Question 19

What is the total surface area (T.S.A) of a cone?

Answer 19

πr(l+r)