twice the redius
Diameter
area of a rectangle
a = l X w
is not considered a polygon
circle
find the area of a square with a side 10 cm
100 cm squared
cylinder
The area of a triangle is
1/2 X b X h
A polygon is any geometric shape
No, only closed shapes
find the circumference of a circle if the ridus is 22
c = 44pi
The unit always cubed
Volume
Area of a circle
A = pi r squared
find the length of a rectangle if the width is 4 in and the area is 20 in squared
l = 5 in
Always perpendicular
base and height
Surface area of cylinder
S.A = 2 pi r (r + h)
find the area of a circle with a ridus 5m
a = 25 pi
Has 3 sides
Triangle
Surface area of a cone
S. A = pi r ( r + l)
What is the diameter of a circle if the area is 36 pi
12
find the volume of a cone if r = 3 h = 9
27 pi