ACT Math Formulas

Front

What is the formula for the area of a circle?

Back

A = π r²

Tags

CCSS.7.G.B.4

Front

What is the formula for the volume of a cone?

Back

V = ⅓ π r² h

Tags

CCSS.8.G.C.9

CCSS.HSG.GMD.A.3

Front

What is the equation of a circle in standard form?

Back

(x - h)² + (y - k)² = r²

Tags

CCSS.HSG.GPE.A.1

Front

How do you calculate the perimeter of a polygon?

Back

Add the lengths of all the sides.

Tags

CCSS.3.MD.D.8

Front

What is the formula for the area of a triangle?

Back

A = ½ bh

Tags

CCSS.6.G.A.1

Front

What is the formula for the circumference of a circle?

Back

C = 2πr or C = πd

Tags

CCSS.7.G.B.4

Front

What is the formula for the area of a rectangle?

Back

A = length × width

Tags

CCSS.3.MD.C.7B

CCSS.4.MD.A.3

Front

What is the formula for the volume of a cylinder?

Back

V = π r² h

Tags

CCSS.8.G.C.9

CCSS.HSG.GMD.A.3

Front

What is the formula for the area of a trapezoid?

Back

A = ½ (b₁ + b₂)h

Tags

CCSS.6.G.A.1

Front

What is the Pythagorean theorem?

Back

a² + b² = c², where c is the hypotenuse.

Tags

CCSS.8.G.B.8