Algebra I Sem 1 Formula sheet
Perimeter of a rectangle
P = 2l + 2w where l = length and w = width
Circumference of a circle C = 2𝜋𝜋r or 𝜋𝜋d where r = radius and d = diameter
Area Formulas:
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Rectangle = LW where L = length and W = width
Triangle = ½bh where b = base and h = height
Square = s2 where s = side
Circle = 𝜋𝜋r2 where r = radius
Parallelogram = bh where b = base and h = height
Trapezoid = ½ h(b1 + b2)
Volume Formulas:
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Prism = Bh where B = area of the base and h = height
Cube = s3 where s = side
Cylinder = 𝜋𝜋r2h where r = radius and h = height
Regular Pyramid = 1/3Bh where B = area of the base and h = height
Cone = 1/3 𝜋𝜋r2h where r = radius and h = height
Linear Equations:
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Slope m = (y2 – y1)/(x2 – x1)
Slope Intercept form y = mx + b where m = slope and b = y-intercept
Point-Slope Form y – y1 = m(x – x1)
Standard Form
Ax + By = C
Direct Variation y = kx
Inverse Variation y = k / x
Arithmetic sequence
tn = t1 + d (n – 1)
Fahrenheit to Celsius: C = 5/9(F – 32)
Celsius to Fahrenheit: F = 9/5C + 32
Distance: D = RT, where D = distance, R = rate, T = time