# The 28 Critical SAT Math Formulas You MUST Know

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## Critical SAT Math Formulas

### Formulas Given on the SAT, Explained ### Area of a Circle ### Area of a Rectangle ### Area of a Triangle  ### The Pythagorean Theorem ### Properties of Special Right Triangle: Isosceles Triangle ### Properties of Special Right Triangle: 30, 60, 90 Degree Triangle ### Volume of a Rectangular Solid ### Volume of a Cylinder ### Volume of a Sphere  ### Volume of a Cone ### Volume of a Pyramid #### Law: the number of degrees in a triangle is 180 ### Slopes and Graphs #### > If the line passes through the origin (0,0), the line is written as y=mx. ### Good to Know

#### i. Given two points, A(x1,y1), B(x2,y2), find the midpoint of the line that connects them: #### i. Given two points, A(x1,y1),B(x2,y2), find the distance between them: ### Circles ### Good to Know

#### ii. Use the formula for the circumference multiplied by the angle of the arc divided by the total angle measure of the circle (360) #### i. Use the formula for the area multiplied by the angle of the arc divided by the total angle measure of the circle   ### Need to Know

#### > Find the average/mean of a set of numbers/terms ### Need to Know

#### > Probability is a representation of the odds of something happening. ### Need to Know ### Trigonometry #### Trigonometry is a new addition to the new 2016 SAT math section. Though it makes up less than 5% of math questions, you won’t be able to answer the trigonometry questions without knowing the following formulas. READ HERE  Maths Tricks for square Roots - Formulas