Circumference, area, and perimeter

Find the perimeter of the rectangle.

• 38 cm.

• 19 cm.

• 84 cm.

• 42 cm.

Find the perimeter of the triangle.

• 120 ft.

• 32 ft.

• 40 ft.

• 20 ft.

What is the formula to find circumference?

•  $c=2\pi r$  

•  $c=\pi r$  

•  $c=2\pi d$  

Find the circumference of the circle. Round to the nearest tenth.

• 113.0 in.

• 1017.4 in.

• 254.3 in.

• 56.5 in.

Find the AREA of this figure.

• $160\ ft.^2$

• 160 ft.

• $80\ ft.\ ^2$

• 1600 feet

Find the Area of this triangle

• 19.8 km²
• 37.8 km²
• 18.9 km²
• 35 km²

What is the diameter?

• 5 in
• 10 in
• 3.14 in
• 15.84 in

What is the circumference?

• 48
• 96
• 24
• 18

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

• Diameter
• Radius

Find the area of the circle

• 56.52
• 254.34
• 1017.36
• 113.04