Math Strategies

Area

100

Area of a trapezoid

A=.5h(b1+b2)

200

Area of a rectangle

A = lw

300

Area of a triangle

A = 1/2bh

400

Area of a square

A = s²

500

Area of a circle

A = pi(r²)

Geometry

100

Pythagorean theorem

a²+b² = c²

200

Degrees in a quadrilateral

360

300

Degrees in a straight line

180

400

Degrees in a pentagon

540

500

Pythagorean triples

3, 4, 5 / 5, 12, 13 / 6, 8, 10 / 9, 12, 15 / 12, 16, 20 / 8, 15, 17

More Formulas

100

Slope intercept formula

y = mx + b

200

Distance formula

D = sqrt ((y2-y1)² + (x2-x1)²)

300

Slope formula

m = (y2-y1) / (x2-x1)

400

Volume of a prism

V=lwh

500

Volume of a cylinder

V=pir²h

Definitions

100

Probability

total desired outcomes

---------------------------

total possible outcomes

200

Mean

sum of items in a set 

------------------------

number of items in a set

300

Median

Middle number in a set

400

Mode

Most common number in a set

500

Circumference

Perimeter of a circle. C = 2pir

Rando!

100

Annotate

Circle numbers. Underline key words. Box question.

200

Trig

SOHCAHTOA

300

Determinant of a matrix

ad-bc

400

Fractions

Make them decimals

500

Plug in Answers

If algebraic & answers are numbers. C/H