Download SAV Lesson 01 Luke

Area
Triangles
and
Parallelograms
Find the perimeter of each figure.
1.
10 in
4 in
2.
9 ft
5 ft
8 ft
3.
A square with sides that are 11 feet long.
Solve for x.
4. 3x = 18
5.
1
x  12  36
2

Area:
Number of square units to cover inside a space.

Perimeter:
The distance around the outside of a figure.
Dimension:
3D is 3 dimensions … length, width, & height
1.
Find the formula which fits the given figure.
2.
Substitute all known values for the variables in the
formula.
3.
Determine if any numbers on the same side of the
equals sign can be combined. If so, combine those
numbers.
4.
Write the answer in a complete sentence.
Find the area of the triangle.
Write the formula.
1
Area  bh
2

Substitute given information.
Area 

Multiply.
Area  20

The area of the triangle is 20 cm2.

1
(8)(5)
2
Find the missing measure. The
area of the rectangle is 72 m2.


Write the formula:
Substitute all known values:

Divide by 12

The width of the rectangle is 6 m.
Area = lw
72 = 12x
72 12 x

12 12
6=x
Find the missing measure.
A = 35 in2

Write the formula.

Substitute all known values.

Multiply numbers on the right side.

Divide by 3.5

The base of the triangle is 10 inches.
1
Area  bh
2
1
35  y 7 
2
35 = 3.5y
35 3.5 y

3 .5 3 .5
10  y
The perimeter of a square bathroom tile is 32 cm. Find
the area of the tile.

Each side of a square is the same length.
Find the length of one side.
32 ÷ 4 = 8 cm
Write the area formula.
Area = s2
Substitute the values for the variables. Area = 82

The area of the tile is 64 cm2.



The perimeter of a rectangle is 24 inches.
Find a possible pair of dimensions for the rectangle.
A wall is made of square cement blocks.
Each square block is 5 inches on each side.
If the wall has 54 blocks in it,
what is the total area of the wall?

Explain the difference between perimeter and area.

What is the relationship between the area of a triangle
and a parallelogram?
Target:
Use area formulas to compute area of geometric
shapes and find missing measures.