7) Construct a figure (may not be drawn to the scale) for an intended 3-D object (YOU MAY NAME IT YOUSELF) that shows four right triangles built around a perfect square where the base of each triangle becomes the side of square thus formed. Provide only an informal sketch required to show the process of composition and decomposition required to develop surface area. No formal Development Required. Find the surface area if the height of the triangle is 6cm and the hypotenuse is 10cm. Just a numerical solution will earn you partial credits only. 8) A cone has 6 cm diameter with height of 12 cm. A cup is considered as frustum of a cone: that is basically what is left after cutting a small cone from the top of a large cone. In this case the height of the cut-off smaller cone is 2cm with 1 cm radius .find the volume of the cup. Justify your reasoning by drawing a diagram that will help students understand the concept of cones using this cup as a reallife object. What is the height of a cup? What concepts in 3D environment were addressed via this example