Area and Perimeter of Composite Shapes Lesson

Area & Perimeter of Composite Polygons

​Dr. Tom Giles

Area and Perimeter

Let's practice finding area and perimeter of various figures.

Multiple Choice

Find the area of the rectangle.

• 140 cm²

• 70 cm²

• 34 cm²

• 64 cm²

Multiple Choice

Find the perimeter.

• 126 cm²

• 25 cm

• 50 cm

• 50 cm²

Circle Time!!

A = πr²

C = πd

Multiple Choice

Does this picture show the diameter or radius of a circle?

• Diameter

• Radius

Multiple Choice

What is the circumference of this circle?

• 3.14 cm 
• 37.7 cm
• 24 cm
• 68.4 cm

Multiple Choice

Find the perimeter.

• 90 in

• 450 in²

• 45 in

• 450 in

Multiple Choice

Find the perimeter.

• 14 cm

• 9 cm

• 144 cm

• 17 cm

Poll

How comfortable are you finding the perimeter of a shape?

• This is so easy!

• I feel mostly confident.

• I could use more practice.

• I need a lot more help to be successful.

Multiple Choice

Find the circumference of a circle with a diameter of 11 millimeters.

• 34.6 mm
• 30 mm
• 25.3 mm
• 34.54 cm

Multiple Choice

Find the area of the figure

• 39,204 in²

• 198 in²

• 58 in²

• 26 square units

Multiple Choice

What is the area of this circle?

• 201.06
• 50.27
• 123.12
• 94.43

Multiple Choice

Find the area of this triangle.

• 150 ft²
• 100 ft²
• 50 ft²
• 35 ft²

Multiple Choice

What is the area of this polygon?

• 120 feet

• 120 square feet

• 50 square feet

• 60 square feet

Multiple Choice

What is the area of this circle?

• 1256.64

• 31.41

• 314.16

• 123.12

Multiple Choice

What is the area of this circle?

• 1256.64

• 31.41

• 314.16

• 123.12

Poll

How comfortable are you finding the area of a shape?

• This is so easy!

• I feel mostly confident.

• I could use more practice.

• I need a lot more help to be successful.

What if there's more than one figure??

ADD!!!

Multiple Choice

Calculate the area.

• 336 cm ²

• 172 cm ²

• 459 cm ²

• 522 cm ²

Multiple Choice

Find the area of the figure.

• 31

• 48

• 60

• 66

Multiple Choice

Find the area of the figure.

• 35

• 84

• 42

• 32

Multiple Choice

Find the area of the figure.

• 48

• 41

• 238

• 119

Multiple Choice

Find the area of the composite figure.

• 100
• 400
• 137.5
• 175

Multiple Choice

Find the area of the figure shown.

• 34 units²

• 960 units²

• 220 units²

• 480 units²

Multiple Choice

Find the area of the figure shown

• 100.53

• 220.53

• 115.53

• 120

Multiple Choice

Find the area of the figure

• 43 sq inches
• 102 sq inches
• 37 inches
• 90 sq inches

Multiple Choice

What is the area of the composite shape?

• 50cm²
• 25cm²
• 40cm²
• 35cm²

Multiple Choice

• 296.96 m2
• 248.96 m2
• 98.24 m2
• 73.12 m2

Multiple Choice

Find the area.

• 32 ft²

• 44 ft²

• 76 ft²

• 120 ft²

Shaded Region

Outside minus Inside!!!

Multiple Choice

What is the area of the shaded region?

• 40 sq cm

• 240 sq cm

• 280 sq cm

• 320 sq cm

Multiple Choice

What is the area of the shaded region?

• 14 m²

• 120 m²

• 106 m²

• 134 m²

Multiple Choice

What is the area of the shaded region?

• 14 m²

• 120 m²

• 106 m²

• 134 m²