Area of Plane Shapes

Area of Plane Shapes

	Triangle Area = ½b × h b = base h = vertical height			Square Area = a2 a = length of side
	Rectangle Area = w × h w = width h = height			Parallelogram Area = b × h b = base h = vertical height
	Trapezoid (US) Trapezium (UK) Area = ½(a+b) × h h = vertical height			Circle Area = πr2 Circumference=2πr r = radius
	Ellipse Area = πab			Sector Area = ½r2θ r = radius θ = angle in radians