ACT Math Formulas

Front

Which is the correct formula for the area of a circle? Options: A = π r², A = 2π r², A=πd, A=π d²

Back

A = π r²

Front

How do you find perimeter?

Back

add all the sides

Front

What is the area of a triangle?

Back

A= ½bh

Front

What is the area of a rectangle?

Back

A = lw

Front

What is the area of a trapezoid?

Back

A= ½h (b₁ + b₂)

Front

What is the formula for volume of a CONE?

Back

V = ⅓ π r² h

Front

What is the formula for volume of a CYLINDER?

Back

V = πr²h

Front

Back

Equation of a circle

Front

slope intercept form

Back

y=mx+b

Front

Back

The number of degrees in a circle is 360.