2015 10.1 cross sections.notebook 1 May 06, 2015 Mar 309:58 PM Unit 10. 1 3D figures and Surface Area I can ...Identify and draw… • nets of 3D figures • cross sections • And find the surface area of prisms and pyramids Apr 2312:16 PM Warm Up: Name as many 3D shapes as possible. Mar 309:58 PM NET • 2D pattern that folds to form a solid. • http://illuminations.nctm.org/Activity.aspx? id=3521 Mar 309:58 PM Solid of revolution • 3D figure created when rotating a 2D figure about a line • Example 1. What 3D figure is created when this triangle is rotated 360 degrees? Mar 309:58 PM More examples • Example 2. • Describe the 3D shape created • Example 3. • Draw the 2D figure that created the 3D figure Mar 309:58 PM CROSS SECTION • the intersection of a solid and a plane • Shape depends on the angle/cut of the plane • http://www.learner.org/courses/learningmath/geometry/session9/part_c/index.html • Make a prediction, which of the following shapes can be made from the cross section of a cube?