ACT Formulas

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 do you call the distance around a circle?

Back

Circumference

Front

What does the formula V = πr²h represent?

Back

The volume of a cylinder

Tags

CCSS.8.G.C.9

CCSS.HSG.GMD.A.3

Front

What is the longest side of a right triangle called?

Back

Hypotenuse

Front

What is the midpoint formula for two endpoints (x₁, y₁) and (x₂, y₂)?

Back

Midpoint = ((x₁ + x₂)/2, (y₁ + y₂)/2)

Tags

CCSS.HSG.GPE.B.6

Front

What is the formula for the area of a circle?

Back

A = πr²

Tags

CCSS.7.G.B.4

Front

What is the Pythagorean theorem?

Back

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

Tags

CCSS.8.G.B.8

Front

What is the formula for the volume of a cone?

Back

V = (1/3)πr²h

Tags

CCSS.8.G.C.9

CCSS.HSG.GMD.A.3

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 = l × w

Tags

CCSS.3.MD.C.7B

CCSS.4.MD.A.3