Area & Perimeter Formulas Review

Perimeter and Area of a Triangle

•  $P=b+c+d$  

•  $A=\frac{1}{2}bh$  

Perimeter and Area of a Square

• $P=s+s+s+s=4s$

• $A=s^2$

Perimeter and Area of a Rectangle

• $P=l+w+l+w$ $=$ $2l+2w$

• $A=lw$

Circumference and Area of a Circle

• $C=2\pi r$ or $C=\pi d$

• $A=\pi r^2$

What is this formula for:

A = Base x Height

• Area of a Parallelogram

• Area of a Triangle

• Circumference of a Circle

• Area of a Circle

What is this formula for:

A = 1/2 x Base x Height

• Area of a Triangle

• Area of a Rectangle

• Area of a Circle

• Area of a Parallelogram

Which formula?

• Area of Rectangle
• Perimeter of Triangle
• Perimeter of Rectangle
• Area of Square

Do you add, subtract, multiply or divide the sides to find perimeter?

• add
• subtract
• multiply
• divide

When measuring area, what label do you use?

• units
• units²
• units³

When finding the perimeter, what label doi you use?

• units
• units²
• units³