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Area of a Traingle:
A=1/2bh

Pythagoras Theorem:

What are the dimensions in a 30, 60, 90 triangle?

What are the dimensions of a 45, 45, 90 traingle?

What is the area and circumference of a circle?

What is the volume of a 3D cube?
Volume: L*W*H

What is the volume and area of a cylinder?

Picking Numbers IN:
 even/odd problems
 percent problems
 algebraic expressions

Eliminate the obvious:
on complex questions.

Figures in the SAT are:
always drawn to scale, unless labelled.

PEMDAS:
Parenthesis, Exponents, Multiply, Divide, Add and Substract.

Special Triangles:
3,4,5 and 6,8,10.

Triangle Inequality Theorem:
When you add lenght of any two side of any traingle, result must be greater than the length of third side.

Average:
Sum of terms/Number of terms.

If you are solving for a percent:
Part/Whole=Percent

If you need to solve for a part:
Percent*WHole=Part

When square root in a term in a equation:
square both sides to eliminate the square root.

Advance Numbers:
Choose a number.

Because absolute value is distance:
its always positive.

Domain:
set of values for which the function is defined.

Range:
set of outputs or results of the function.

Linear function:
equation whose graph is a straight line.

Slopes of perpendicular lines:
Negative reciprocals.

Slopes of parellel lines:
Equal.

Quadratic function:
ax(squared)+bx+c

Transformation:
Alteration of any function.

f(x)+n:
shifts grap of f(x) n units up.

f(x)n:
shifts grap of f(x) n units down.

f(x+n):
shifts grap of f(x) n units left.

f(xn):
shifts grap of f(x) n units right.

Equation of a straight line:
y=mx+b


When a line is tangent to a circle:
it is perpendicular to the radius that it intersects.

Positive Slopes:
tilt upward to the right.

Negative Slopes:
tilt downward to the right.

Horizontal Lines:
have a slope of zero.

Vertical Lines:
have an undefined slope.

Parallel Lines:
have equal slopes.

Perpendicular Lines:
have negative reciprocal slopes.

Union of sets:
(U) symbol. set of elements that are in either or both of the different sets you start with.

Intersection of Sets:
(n) symbol. set of elements common to the sets you start with.

Direct variation:
y=kx, where k is nonzero constant.

Inverse Variation:
xy=k, where x and y are variables and k is constant.

Probability:
desired outcomes/possible outcomes.


