Example 9:
Example 7:
Find the area of the circle below.
Use 3.14 for 𝜋.
Find the area of the trapezoid
below.
2.5 mi
2 mi
3m
4 mi
Example 4:
Example 2:
Find the area of the parallelogram
below.
Find the area of the rectangle below.
11.1m
Area Formulas
2-D Geometry
9.6 in.
12.8 m
11.2 in.
Rectangle
Parallelogram
Example 1:
Find the area of the rectangle below.
7.5 ft
Example 5:
Example 3:
Find the area of the parallelogram
below.
Find the area of the triangle below.
8.2 ft
10 ft
11.2 m
3.9 ft
7m
Example 10:
Find the area of the circle below.
Use 3.14 for 𝜋.
8 in.
Example 8:
Find the area of the trapezoid
below.
14 ft
Example 6:
Find the area of the triangle below.
3 ft
9 cm
11 ft
16 cm
Circle
Trapezoid
Triangle
Example 9:
Example 7:
Find the area of the circle below.
Use 3.14 for 𝜋.
Find the area of the trapezoid
below.
2.5 mi
2 mi
3m
Answer Key!
4 mi
1
A = h(b1 + b2)
A=
A = 28.26 m2
𝜋r2
2
A = 10 mi2
Example 4:
Example 2:
Find the area of the parallelogram
below.
Find the area of the rectangle below.
Area Formulas
2-D Geometry
A = bh
A = 107.52 in2
9.6 in.
11.1m
A = bh
A = 142.08 m2
12.8 m
11.2 in.
Rectangle
Parallelogram
Find the area of the rectangle below.
7.5 ft
Find the area of the parallelogram
below.
8.2 ft
1
A = bh
A = bh
A = 31.98 ft2
3.9 ft
2
A = 39.2 m2
7m
Example 10:
Find the area of the circle below.
Use 3.14 for 𝜋.
Find the area of the triangle below.
Example 8:
Find the area of the trapezoid below.
8 in.
14 ft
Example 6:
Find the area of the triangle below.
3 ft
A = 𝜋r2
A = 50.24 in2
1
A = bh
11 ft
2
1
A = h(b1 + b2)
2
A = 37.5 ft2
A = 72 cm2
9 cm
10 ft
A = bh
A = 75 ft2
Example 5:
Example 3:
11.2 m
Example 1:
16 cm
Circle
Trapezoid
Triangle
© Lisa Davenport 2013
Directions:
Step 1: Print pages 1 & 2 front to back so that the information is facing in opposite
directions.
Step 2: Cut along the dotted lines so that you have 3 narrow strips of paper.
Step 3: Line up the strips so that say “Triangle”, “Trapezoid”, and “Circle”, as shown below.
Step 4: Fold over the top half of each of the strips
& secure at the top with two staples.
The final product should look like this: