Area, Perimeter, Circumference

Circumference of a Circle

• C=πr²

• C=2πr

• C=2π

Tags

CCSS.HSG.GMD.A.1

What is the formula for area of a triangle?

• $A=\frac{1}{2}h\left(b_1+b_2\right)$

• $A=bh$

• $A=\frac{1}{2}bh$

What is the formula for area of a trapezoid?

• $A=\frac{1}{2}h\left(b_1+b_2\right)$

• $A=bh$

• $A=\frac{1}{2}bh$

What is the formula for area of a parallelogram?

• $A=\frac{1}{2}h\left(b_1+b_2\right)$

• $A=bh$

• $A=\frac{1}{2}bh$

What is the formula for area of a circle?

•  $A=\pi r$  

•  $A=\pi r^2$ 

•  $A=\pi d$ 

•  $A=\pi d^2$  

What is the diameter?

• 5 in

• 10 in

• 3.14 in

• 15.84 in

Tags

CCSS.7.G.B.4

Find the area of the circle

• 43.96

• 153.86

• 87.82

• 307.72

Tags

CCSS.7.G.B.4

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

• Diameter

• Radius

Tags

CCSS.4.G.A.1

Find the area of the circle

• 56.52

• 254.34

• 1017.36

• 113.04

Tags

CCSS.7.G.B.4

Find the circumference of the circle.

• 113.04

• 1017.36

• 254.34

• 56.52

Tags

CCSS.7.G.B.4