Area Basics
What is the area of a rectangle that is 5 cm long and 3 cm wide?
Area = L x W
A= 5 x 3
A= 15 cm2
What is the perimeter of a square with 6 cm sides?
P = 6 + 6 + 6 + 6
P= 24 cm
Jake wants to put a fence around his garden. Should he find area or perimeter?
Perimeter
True or False: All sides of a parallelogram are always equal in length.
False
What is the formula for the area of a triangle?
Area = b x h / 2
(half the base x height)
What is the formula for the area of a rectangle?
Area = Length x Width
A rectangle is 7 cm long and 3 cm wide. What is its perimeter?
P =20 cm
Emma wants to tile her bathroom floor. Should she find area or perimeter?
Area
Yes! But only if the height is given because height is width.
If only the side lengths are given, we won't know for sure!
True or False: All triangles have equal sides.
False.
A square has a side length of 4 cm. What is its area?
4 x 4= 16
16 cm2
A triangle has sides measuring 5 cm, 6 cm, and 7 cm. What is its perimeter?
p = 5 + 6 + 7
p= 18 cm
A classroom rug is 4 m by 6 m. What is the area of the rug?
A= 4x6
A= 24 m2
A parallelogram has sides of 6 cm and 10 cm. What is its perimeter?
p = 6 + 6+ 10 +10
p= 32cm
A triangle has a base of 10 cm and a height of 4 cm. What is its area?
Area= b x h /2
A= 10 x 4 /2
A= 40 / 2
A= 20 cm2
What is the area of a parallelogram that is 9 m long and 2 m high?
Area= b x h
A= 9 x 2
A= 18 m2
What is the perimeter of a parallelogram that has a base of 9 and a side length of 2?
p = 9 + 9 + 2+ 2
p= 22
A yard is 8 m long and 3 m wide. What is the total fencing needed to enclose the space?
p = 8 + 8+ 3+ 3
p= 22 m of fencing
A parallelogram has a base of 10 cm and a height of 4 cm. What is its area?
area = b x H
A= 10 x 4
A= 40 cm2
A triangle has a base of 4 cm and a height of 3 cm. What is its area?
Area= b x h/2
A= 4 x 3 /2
A= 12 /2
A= 6 cm2
How do you find the area of a parallelogram?
Area = Base x Height
An equilateral triangle has a side length of 5.5 cm. What is the perimeter?
p = 5.5 + 5.5 + 5.5
p= 16.5 cm
A rectangle has an area of 36 cm2. What could two of the dimensions be?
Different answers possible:
6x6
4x9
1x36
2x18
3x12
A parallelogram has an area of 48 cm² and a base of 6 cm. What is the height?
48 cm2= 6 X ____
48= 6 x 8
The height is 8 cm.
A triangle has an area of 24 cm² and a base of 6 cm. What is the height?
Area = b x h /2
24 = 6 x ____ / 2
24= 6 x 8 ( = 48) / 2