GRE: Math2
GRE Math2 Flashcards - Most Studied - #7,9,10,12 I deleted ones that didn't make sense
Kalvin
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If y is directly proportional to x, what does it equal?y/x is a constant
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What is a percent?A percent is a fraction whose denominator is 100.
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#1 What is an important property of a 30-60-90 triangle?• The triangle is a right triangle.
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#2 What is an important property of a 30-60-90 triangle?• The hypotenuse is twice the length of the shorter leg.
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#3 What is an important property of a 30-60-90 triangle?The ratio of the length of the three sides is x:x√3:2x
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The negative exponent x⁻ⁿ is equivalent to what?1/xⁿ i.e. 5^-3 = 1/(5^3) = 1/ 125 = .008
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formula for area of a triangleA=½bh
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formula for volume of a rectangular solidV=l×w×h
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formula for the volume of a cubeV=side³
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#1 What are the important properties of a 45-45-90 triangle?• The triangle is a right triangle.
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#2 What are the important properties of a 45-45-90 triangle?• The triangle is isosceles (AC=BC).
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#3 What are the important properties of a 45-45-90 triangle?• The ratio of the lengths of the three sides is x:x:x√2.
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formula for distance problemsdistance=rate×time or d=rt
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A quadrilateral where two diagonals bisect each otherParallelogram
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In a rectangle, all angles areRight
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In a Rectangle, each angles measures90°
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The Perimeter of a rectangleP=2(l+w)
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Area of a Parallelogram:A=(base)(height)
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(x-y)(x+y)x²-y²
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(x-y)²x²-2xy+y²
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(x+y)² x²+2xy+y²x²+2xy+y²
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