Unit 9 Shape Formulas

What shape is this formula of Area for?

• Rectangle

• Circle

• Trapezoid

• Triangle

What shape is this formula of Area for?

• Rectangle

• Circle

• Trapezoid

• Triangle

What shape is this formula of Area for?

• Rectangle

• Circle

• Trapezoid

• Triangle

What shape is this formula of Area for?

• Rectangle

• Circle

• Trapezoid

• Triangle

Which formulas can be used to find circumference of a circle?

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 $A=\frac{1}{2}\pi r^2$  
This formula is used to find the area of a 

• Circle

• Triangle

• Semi-Circle

• Quarter Circle

 $A=\frac{1}{4}\pi r^2$  
This formula is used to find the area of a 

• Circle

• Triangle

• Semi-Circle

• Quarter Circle

What setup can be used to find the area of this shape?

• $A=\frac{1}{4}\pi8^2$

• $A=\frac{1}{2}\pi8^2$

• $A=\frac{1}{2}\times8\times16$

• $A=4\pi8$

What setup can be used to find the area of this shape?

• $A=\frac{1}{4}\pi8^2$

• $A=\frac{1}{2}\pi8^2$

• $A=\frac{1}{2}\times8\times16$

• $A=\frac{1}{2}\times8\times6$

What setup can be used to find the area of this shape?

• $A=\frac{1}{4}\pi8^2$

• $A=\frac{1}{2}\pi8^2$

• $A=2\pi8$

• $A=\frac{1}{2}\times8\times6$