Lesson 11
Usemos un transportador para dibujar ángulos
Lesson Purpose
The purpose of this lesson is for students to use a protractor to draw angles of given measurements.
Lesson Narrative
In earlier lessons, students reasoned about angle measurements, learned to use a protractor, and measured given angles. They have sketched angles by referring to clock faces and sketched estimates of angles of a given size based on benchmark angles.
In this lesson, students use a protractor to draw angles of specified measurements (not limited to benchmark angles) and to verify the size of angles in their peers’ drawings. They begin to use known angle measurements to reason about unknown measurements and notice relationships between the measurements of angles that share a common endpoint.
- Action and Expression
- MLR8
Learning Goals
Teacher Facing
- Use a protractor to draw angles of given measurements.
Student Facing
- Dibujemos algunos ángulos.
Required Materials
Materials to Gather
Required Preparation
CCSS Standards
Addressing
Lesson Timeline
| Warm-up | 10 min |
| Activity 1 | 15 min |
| Activity 2 | 20 min |
| Lesson Synthesis | 10 min |
| Cool-down | 5 min |
Teacher Reflection Questions
What were some of the challenges students encountered when measuring and drawing angles? What support might help students overcome those hurdles?
Suggested Centers
- Target Measurements (2–5), Stage 4: Degrees (Addressing)
- Compare (1–5), Stage 5: Fractions (Supporting)