Area Formulas

Which formula would you use to find the area of this figure?

• $A=\pi r^2$

• $A=bh$

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

• $A=\frac{1}{2}bh$

What's the area of a rectangle with a base of 10 ft. and a height of 8 ft?

• $18\ ft^2$
  

• $80\ ft^2$

• $44\ ft^2$

• $36\ ft^2$

Which formula would you use to find the area of this figure?

• $A=bh$

• $A=\frac{1}{2}aP$

• $A=\frac{1}{2}bh$

• $A=\pi r^2$

What's the area of a triangle with a base of 4.2 in. and a height of 2.3 in?

• $5.2\ in^2$

• $4.25\ in^2$

• $9.66\ in^2$

• $4.83\ in^2$

Which formula would you use to find the area of this figure?

• $A=\frac{1}{2}bh$

• $A=\frac{1}{2}aP$

• $A=bh$

• $A=\pi r^2$

What's the area of a circle with a radius of 14 in? Put your answer in terms of pi.

• $28\pi\ in^2$

• $70\pi\ in^2$

• $196\pi\ in^2$

• $14\pi\ in^2$

Which formula would you use to find the area of this figure?

• $A=bh$

• $A=\frac{1}{2}aP$

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

• $A=\pi r^2$

What's the area of a regular nonagon with an apothem of 1.3 in and one of the sides is 7.2 in?

•  $84\ in^2$  

•  $42.1\ in^2$  

•  $18.7\ in^2$  

•  $4.7\ in^2$