7th Math Composite Figures

Which two formulas are needed to find the area of the shaded region?

•  $A=bh$  

•  $A=\frac{1}{2}bh$  

•  $C=2\pi r$  

•  $A=\pi r^2$  

What is the radius of each circle?

• 6 in.

• 3 in.

• 12 in.

Which substitution can be used to find the area of one circle?

• $A=2\times\pi\times3$

• $A=\pi\times6$

• $A=\pi\times3^2$

The area of the rectangle is:

•  $A=24\ x\ 22=528\ in^2$  
  

•  $A=24+24+22+22=92\ in^2$  
  

•  $A=24+22=46\ in^2$  
  

To find the area of the shaded region, we need to...

•  add the area of the four circles to the area of the rectangle
  

• subtract the area of the four circles from the area of the rectangle 
  

Which formula can be used to find the area of the semi-circle?

• $A=\frac{\pi\times5^2}{2}$

• $A=\frac{\pi\times10^2}{2}$

• $A=\frac{\pi\times5}{2}$

Which formula can be used to find the area of the triangle?

• $A=10\times12$

• $A=\frac{1}{2}\left(10\times12\right)$

• $A=\frac{1}{2}\left(5\times12\right)$

To find the area of the composite figure, we must _______ the areas of the two figures.

• add

• subtract

• multiply

What is the diameter of the largest circle?

• 6 cm

• 9 cm

• 12 cm

• 18 cm

What is the radius of the largest circle?

• 6 cm

• 9 cm

• 12 cm

• 18 cm