Area
A measure of flat surface
What is area?
Perimeter is
distance around a flat (plane) object or figure
How much fence material should Steve buy to surround a garden space that is in the shape of a square 4 yards on a side?
16yd
A plane shape (two-dimensional) with straight sides formed by three or more sides.
What is a Polygon?
Name of a regular polygon with 3 sides
Triangle
Formula to calculate the surface area of a square, rectangle, and a parallelogram.
A= (L)(W) or A=(b)(h)
To calculate the Perimeter of any shape you
add all the sides
Jacob is covering a square table with glass. How much glass will be needed if the table measures 10 cm on each side?
100 cm2
Name a regular polygon with five sides
Pentagon
Formula to find area of a Triangle
A=1/2 b. h
The area of a surface can also be calculated by counting the inside
square units
When shapes have different units of measurement, like ft and inches you work with them
separately
Lydia ran two laps around the park. The park is 4 km long and 2 km wide. What distance did Lydia run?
24 km
Name of the polygon with 9 sides
Nonagon
Formula to find the area of a parallelogram
A=b.h
This is the formula to find the area of a square
A= S2
What other formula can be use?
A= (L) (W)
Perimeter is distance around a shape, but when is a circular shape is called
Circumference
Olivia is making a tablecloth that covers a surface area of 9 square feet. What is the measure of each side?
3 ft
Name a regular polygon with 4 sides
Quadrilateral (Squares, Rectangles, parallelogram)
Formula to find the area of a square
A=(l) (w) or A=S2
A= (L) (W) is the same as
A= (b) (h)
To calculate the distance around an irregular figure you
add all the sides
Aydeluz is putting baseboard around her front door. The door is 6 ft tall and 3 ft wide. How much baseboard material does she need?
(Remember, allow 3 ft without a board for the bottom of the door)
15 ft
Name of a regular polygon with 8 sides
Octagon
Formula to calculate the perimeter of a rectangle
P=2(L)+2(W)