# Lesson 16

Guess the Figure (optional)

### Lesson Purpose

The purpose of this lesson is for students to apply their understanding of geometric figures and measurements to draw, describe, and identify two-dimensional figures.

### Lesson Narrative

This lesson is optional because it does not address any new mathematical content standards. This lesson does provide students with an opportunity to apply precursor skills of mathematical modeling.

In the first activity, students practice using the geometric vocabulary they acquired during the unit to describe changes they notice in a given figure. In the second activity, students first draw a two-dimensional figure and then describe it to a partner without showing it to them. The partner attempts to draw the figure based solely on the description. Students have an opportunity to compare the original and drawn figure.

- Representation

- MLR2

### Learning Goals

Teacher Facing

- Draw and identify acute, obtuse, right, and straight angles in two-dimensional figures.
- Draw and identify points, lines, rays, segments, and parallel and intersecting lines in geometric figures.

### Student Facing

- Let’s draw and identify all kinds of two-dimensional figures.

### Required Materials

### Required Preparation

Activity 1:

- Create a set of cards from the blackline master for each group of 2 students.

### Lesson Timeline

Warm-up | 10 min |

Activity 1 | 15 min |

Activity 2 | 20 min |

Lesson Synthesis | 10 min |

### Teacher Reflection Questions

Which students had opportunities to share their diagrams and thinking during the whole-class discussion? How did you select these students?

### Suggested Centers

- Which One? (K–5), Stage 4: Grade 3 Shapes (Supporting)
- Can You Draw It? (1–5), Stage 4: Area and Perimeter (Supporting)