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Area of a Traingle: 
A=1/2bh
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Pythagoras Theorem:
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What are the dimensions in a 30, 60, 90 triangle?
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What are the dimensions of a 45, 45, 90 traingle?
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What is the area and circumference of a circle?
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What is the volume of a 3D cube?
Volume: L*W*H
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What is the volume and area of a cylinder?
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Picking Numbers IN:
- even/odd problems
- percent problems
- algebraic expressions
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Eliminate the obvious:
on complex questions.
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Figures in the SAT are:
always drawn to scale, unless labelled.
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PEMDAS:
Parenthesis, Exponents, Multiply, Divide, Add and Substract.
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Special Triangles:
3,4,5 and 6,8,10.
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Triangle Inequality Theorem:
When you add lenght of any two side of any traingle, result must be greater than the length of third side.
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Average:
Sum of terms/Number of terms.
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If you are solving for a percent:
Part/Whole=Percent
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If you need to solve for a part:
Percent*WHole=Part
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When square root in a term in a equation:
square both sides to eliminate the square root.
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Advance Numbers:
Choose a number.
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Because absolute value is distance:
its always positive.
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Domain:
set of values for which the function is defined.
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Range:
set of outputs or results of the function.
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Linear function:
equation whose graph is a straight line.
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Slopes of perpendicular lines:
Negative reciprocals.
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Slopes of parellel lines:
Equal.
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Quadratic function:
ax(squared)+bx+c
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Transformation:
Alteration of any function.
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f(x)+n:
shifts grap of f(x) n units up.
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f(x)-n:
shifts grap of f(x) n units down.
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f(x+n):
shifts grap of f(x) n units left.
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f(x-n):
shifts grap of f(x) n units right.
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Equation of a straight line:
y=mx+b
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When a line is tangent to a circle:
it is perpendicular to the radius that it intersects.
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Positive Slopes:
tilt upward to the right.
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Negative Slopes:
tilt downward to the right.
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Horizontal Lines:
have a slope of zero.
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Vertical Lines:
have an undefined slope.
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Parallel Lines:
have equal slopes.
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Perpendicular Lines:
have negative reciprocal slopes.
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Union of sets:
(U) symbol. set of elements that are in either or both of the different sets you start with.
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Intersection of Sets:
(n) symbol. set of elements common to the sets you start with.
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Direct variation:
y=kx, where k is nonzero constant.
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Inverse Variation:
xy=k, where x and y are variables and k is constant.
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Probability:
desired outcomes/possible outcomes.
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