Education Technology

Geometry, Cones and Witchs' Hats

Published on 10/20/2009

Activity Overview

From a sheet of cardboard 40 cm square, I need to make a conical witches hat for my child's party. If we assume she has a circular head of diameter 14 cm, what is the tallest hat I can make? Assume I will make the cone by cutting a sector from a circle: what angle must I make this sector?

Before the Activity

Distribute the student TNS file and worksheet before the activity.