Area of a Square
A= b^2
Area of a Semi-Circle
pi/8(b^2)
Area of a Rectangle
1/2(b^2)
Area of an Equilateral Triangle
sq rt of 3/4(b^2)
Area of an Isosceles Right Triangle with Base as Leg
1/2(b^2)
Area of an Isosceles Right Triangle with Base as Hypotenuse
b^2/4
Area of a Quater-Circle
pi/4(b^2)