Math Focus 5
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## CHAPTER 11: 2-D AND 3-D GEOMETRY

### Lesson 2: Parallel, Intersecting, and Perpendicular Lines and Faces

Use these interactive activities to encourage your child to have fun on the Web while learning about 2-D and 3-D Geometry.

Goal
Identify and draw parallel, intersecting, and perpendicular lines, edges, and faces.

Builds Upon
Student Book pages 370–373

Instructions for Use

3-D Solidsallows your child to manipulate 3-D shapes and find out how many edges, vertices, and faces they have.

Click on either “Prisms” or “Pyramids” and then click on a shape you wish you see. Identify the parallel edges, parallel faces, perpendicular edges, and perpendicular faces for each shape.

Geometric Solids allows your child to learn about various geometric solids and their properties.

Manipulate and color each shape to explore the number of faces, edges, and vertices. Click “New Shape” to get another shape. For each shape identify the parallel edges, parallel faces, perpendicular edges, and perpendicular faces.