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SAT Prep Vocab
Question | Answer |
---|---|
Supplementary Angles | 2 angles whos sum is 180 |
Chord | segments whos endpoints are in a circle |
Area of a circle | pir^2 |
Circumference of a circle | 2pir |
Slope formula | (y2-y1)/(x2-x1) = rise/run |
Midpoint formula | (x1+x2/2 , y1+y2/2) |
Distance formula | d= the sqrt((x2-x1)^2+(y2-y2)^2) |
Equation of a circle | (x-h)^2+(y-k)^2=r^2 Center of the circle is (h,k) |
Equation of an Ellipse | (x-h)^2+(y-k)^2=1 |
Remember for sin, cos, and tan | SOHCAHTOA |
Secant | 1/cos |
Cotangent | 1/tan |
Remember sin and cos | sin^2 the angle + cos^2 the angle=1 |
Percent increase/decrease | change in the amount/original amount x 100 |
Difference of squares formula (FOIL) | a2 – b2 = (a + b)(a – b) or (a – b)(a + b) |
Systems of equations | Substitute |
is, has, was, will, be | = |
more, total increases by, exceeds, gains | + |
less, decreased, lost, fewer, difference | - |
of, product, each | x |
Rates | distance= rate x time |
vertex | h= |
Range | difference between the smallest and the largest number |
Mean | the average -add them up and divide by the total added |
Median | the middle value in a set of numbers |
Mode | the number that repeats the most in a set of numbers |
Probability | desired outcomes/total outcomes |
Domain | x |
Range | y |