# Math Concepts

 .remove_background_ad { border: 1px solid #555555; padding: .75em; margin: .75em; background-color: #e7e7e7; } .rmbg_image { max-height: 80px; } 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 problemspercent problemsalgebraic 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(x-n): shifts grap of f(x) n units right. Equation of a straight line: y=mx+b Midpoint formula: 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. Distance Formula: .remove_background_ad { border: 1px solid #555555; padding: .75em; margin: .75em; background-color: #e7e7e7; } .rmbg_image { max-height: 80px; } Authoranjil.adhikari ID28902 Card SetMath Concepts DescriptionBasic and Advanced Math Concepts Updated2010-08-04T04:23:32Z Show Answers