Mathematics 4

# Lesson 1 - Sketching Faces

To encourage students to have fun on the Web while learning about Sketching Faces, here are some games and interactive activities they can do on their own or in pairs.

### Goal

Describe relationships between 3-D shapes and their 2-D faces.

### Builds Upon

Student Book pages 294

### Instructions for Use

The Platonic Solids helps students predict the number of edges, faces, and vertices on different objects.

To use The Platonic Solids, click and drag the left mouse button to rotate each object. Click in the text field to input the number of faces, vertices, and edges for each object. Click 'Check' to check your answers.

Getting to Know Shapes prompts students to describe 3-D shapes.

To use Getting to Know Shapes, click the 'Click to use the Tools'. Click 'New Shape' to select a shape. Rotate a shape by dragging the mouse across the surface. Click the 'Transparent' box to show a skeleton model of the object. Use the slider to increase and decrease the size of the object. Record your answers to the questions in the chart.