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ACT math Formulas

Formulas needed for the ACT math test

QuestionAnswer
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
Created by: user-1495509
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