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Distance Formula
√((x - x)² + (y - y)²)
Midpoint Formula
x1 + x 2 y1 + y2
--------- , ---------
2 2
Interior Angles Formula
(Number of Angles - 2) × 180
Equation For a Circle
(x-h)² + (y-k)² = r²
(h,k) = center
Area of Regular Polygon
A = 1/2aP
a = apothem p = perimeter
Volume for Prism/Cylinder
V = B x h
Volume for Pyramid/Cone
V = 1/3 B x h
Lateral Area for Right Cone
L = pi × r × l
Surface Area for Right Cone
S = (pi × r × l) + (pi × r²)
Volume of a Sphere
V = (4/3) × pi × r³
a + c = 180
b + d = 180
a (a+b) = c(c+d)
a × b = c × d
c = 1/2(a+b)
c = 1/2(a-b)