Unit 7, Lesson 12
Tipos de ángulos
Grado 4
Preparation
Lesson Purpose
The purpose of this lesson is for students to classify angles as acute, obtuse, and straight, and to identify and draw acute and obtuse angles.
Lesson Narrative
In previous lessons, students learned to measure angles and draw angles of given measurements. They saw that a
In this lesson, students classify angles by size, and identify angles as acute or obtuse in a variety of contexts. Students also learn that a
- Representation
None
- Comprehend (in spoken and written language) the meaning of the terms "acute angle," "obtuse angle," "right angle," and "straight angle."
- Identify acute, obtuse, right, and straight angles in two-dimensional figures.
- Examinemos diferentes tipos de ángulos.
Required Materials
Activity 1
Activity 2
Activity 3
Required Preparation
Activity 1
- Students need their angle cards from the previous lesson.
Lesson Timeline
Warm-up
Activity 1
Activity 2
Activity 3
Lesson Synthesis
Cool-down
Teacher Reflection Questions
Before this point, students have had experiences of sorting mathematical objects relative to some benchmarks. In this lesson, angles are categorized by size, relative to two benchmarks:
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