Volume and area of triangles and cones and spheres Flashcards
1
Q
How do we find the area of a triangle?
A
By using Heron’s formula.
2
Q
What is formula for area of triangle, given the measure of all 3 sides
A
s= a+b+c/2
=sqrt 2(s-a)(s-b)(s-c)
3
Q
formula of volume of cone
A
1/3 pi r2 x h
4
Q
formula of surface area of cone
A
1 pi r2 + pi r x l
2 pi r (l + r)
5
Q
unit for volume
A
m3 or cm3
6
Q
unit for surface area?
A
m2
7
Q
AREA of curved surface
A
pi r l
8
Q
area of the base of a cone
A
pi r 2
9
Q
circumference of circle
A
2 π r
10
Q
area of circle
A
πr2
11
Q
how to find the radius
A
12
Q
surface area of sphere
A
4 π r 2
13
Q
volume of sphere
A
4/3 π r 3
14
Q
surface area of a hemisphere
A
3πr2
15
Q
volume of a hemisphere
A
2/3 πr3
