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ACT math Formulas
Formulas needed for the ACT math test
Question | Answer |
---|---|
Pythagoreans Theorem | a^2+ b^2 = c^2 |
Area of a Circle | πr^2 |
Slope-Intercept form | y = mx + b |
Quadratic formula | (-b ± √b^2 - 4ac) /2a |
Area of a triangle | 1/2 b h |
distance formula | √(x - x)^2 + (y-y)^2 |
cirumference of a circle | 2πr or πd |
volume of a rectangular prism | V = lwh |
Area of a rectange | lw |
Midpoint formula | ((x + x)/2, (y+y)/2) |
Area of a parallelogram | bh |
slope formula | (y - y) /(x - x) |
Tan x | opp/adj |
Complementary Angles | add to 9o degrees |
supplementary Angles | add to 180 degreees |
Equation of a circle | (x - h)^2 + (y - k)^2 = r^2 |
cos x | adj / hyp |
Area of a trapezoid | 1/2 ( b + b) h |