Area of common 2D shapes and composite figures

What you'll learn

1. Apply area formulas for rectangles (A=lw), triangles (A=1/2*bh), parallelograms (A=bh), trapezoids (A=1/2*(b1+b2)*h), and circles (A=pi*r^2)
2. Decompose composite figures into non-overlapping simpler shapes and sum their areas
3. Find the area of shaded regions by subtracting the area of an inner shape from an outer shape
4. Calculate the area of polygons on the coordinate plane