Sometimes it helps to rearrange the parts of geometric figures to find the area. That's what we're going to do here.
Area of composite figures is a free educational video by Khan Academy.It helps students in grades 6 practice the following standards 6.G.A.1.
1. 6.G.A.1 : Find the area of right triangles, other triangles, special quadrilaterals, and polygons by composing into rectangles or decomposing into triangles and other shapes; apply these techniques in the context of solving real-world and mathematical problems..