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What are the area formulas of the basic shapes? (Circle, Semicirlce, Square, Isosceles Triangle, and Equilateral Triangle)
Circle: A = ⫪r^2
Semicircle: A = (1/2) ⫪r^2
Square: A = s^2
Isosceles Triangle: A = (hyp)^2/4
Equilateral Triangle: A = (√3/4)s^2