8th Grade Math Facts

Formulas

100

What is slope-intercept form?

y=mx+b

200

What is the pythagorean theorem?

a²+b²=c²

300

What is the formula for the volume of a cylinder?

V=pi*r²*h

400

What is the formula for the volume of a cone?

V=1/3*pi*r²*h

500

What is the formula for the volume of a sphere?

V=4/3*pi*r³

Perfect Squares/Cubes

100

What is 5²?

25

200

What is 9²?

81

300

What is 12²?

144

400

What is 3³?

27

500

What is 10³?

1,000

Square/Cube Roots

100

What is the square root of 4?

2

200

What is the square root of 36?

6

300

What is the cube root of 8?

2

400

What is the square root of 100?

10

500

What is the cube root of 125?

5

Rational or Irrational?

100

Is pi rational or irrational?

Irrational (goes on forever and ever)

200

Is 0.1875 rational or irrational?

Rational (decimal that terminates/stops)

300

Is the square root of 9 rational or irrational?

Rational (perfect square)

400

Is 0.79653355355355..... rational or irrational?

Rational (it repeats)

500

Is the square root of 3 rational or irrational?

Irrational (not a perfect square)

One Step Equations

100

Solve for n.

2 = 10 + n

-8

200

Solve for y.

-2 + y = 6

8

300

Solve for x. 

11x = 33

3

400

Solve for s. 

-6 = 6s

-1

500

Solve for w.

-2w = 18

-9