Formulas
Area and Perimeter in Real Life!
Oops!
Area and Perimeter
100
What does L stand for?
length
100
Mr. PB is trying to find the total length of the outside of a shape.
What is he trying to calculate?
Perimeter
100
Mr. Plant starts adding the side lengths together to find the area.
You need to multiply for area!
100
What is the perimeter of this shape?
16 cm
200
What does W stand for?
Width
200
Mr. PB is trying to find the total space on the inside of a shape.
What is he trying to calculate?
Area!
200
Bobert is trying to find the perimeter of a square.
He multiplies the length and width together to get his answer
He needs to add not multiply.
200
What is the Area of this shape?
25 cm
300
TRUE OR FALSE
Does this formula make sense?A= 2xL+2xW
No! The A should be a P
300
Mr. PB is trying to find how much fence he needs to put around his backyard. He will need to use:
a) Perimeter
b) Area
a) Perimeter
300
Find the area of a rectangle where L=5 W=2
A=L x W
= 5 x 5
=25 cm2
They put in the wrong number for width!
300
12
400
TRUE OR FALSE.
A= l x w would work for a triangle
FALSE!
It is A=(bxh)/2
400
Mr. PB is trying to figure out how many tiles he will need to replace the floor in his portable.
He will need to figure out the:
A) Area
B) Perimeter
A) Area
400
Mr. Fox wants to find the area of a triangle and multiplies the base times the height
They need to divide by two!
400
What is the area of this triangle?
70 m
500
TRUE OR FALSE.
This formula would allow you to find the perimeter of a rectangle: P=l+l+w+w
TRUE
500
Mr. PB is trying to paint a wall. He wants to figure out how much paint he will need.
What kind of math will he need to use?
AREA
500
Stanley is finding the perimeter of an nonagon and adds 9 different numbers
The numbers would have to be the same if its an octagon!
500
What is the area?
50 in