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The Mystery of Missing Angles

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Isabel Rebora

Tier 3
For Schools

Lesson Plan

Solving Angle Mysteries

Students will solve puzzles involving missing angles in complex shapes, reinforcing their understanding of angle relationships.

This lesson enhances problem-solving skills and solidifies geometric knowledge by challenging students with engaging angle puzzles.

Audience

7th Grade Student

Time

40 minutes

Approach

Interactive guided practice followed by independent problem solving.

Materials

Solving Angle Mysteries, Mystery Angles Slides, and Angle Puzzle Quiz

Prep

Preparation Overview

10 minutes

  • Review the Solving Angle Mysteries lesson plan to understand the structure and content.
  • Familiarize yourself with the Mystery Angles Slides for visual examples and puzzles.
  • Examine the Angle Puzzle Quiz to gauge the types of questions and puzzles that will be used during the session.

Step 1

Introduction and Review

5 minutes

  • Introduce key concepts of angles and discuss relationships in various polygons.
  • Ask questions like, 'What angles do you observe in these shapes?' to engage the student.

Step 2

Guided Exploration of Mystery Angles

15 minutes

  • Utilize the Mystery Angles Slides to display puzzles and complex shapes with missing angles.
  • Encourage the student to share their problem-solving ideas and thought process.
  • Discuss any additional information needed to solve the puzzles.

Step 3

Individual Work with Angle Puzzle Quiz

10 minutes

  • Have the student complete the Angle Puzzle Quiz independently.
  • Provide support and guidance as needed while the student works through the puzzles.

Step 4

Discussion and Wrap-Up

10 minutes

  • Recap the key points from the lesson and ensure the student understands the relationships between angles in complex shapes.
  • Address any remaining questions, and highlight effective problem-solving strategies.
  • Summarize how solving these puzzles deepens their understanding of geometry.
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Slide Deck

The Mystery of Missing Angles

Welcome to our exciting lesson on solving angle puzzles! Today, we will uncover hidden angles in various complex shapes.

Introduce the session with an engaging overview. Emphasize the mystery element and the fun challenge of discovering missing angles in shapes.

Introduction to Angles

Understand what angles are and learn about different types: acute, right, and obtuse angles.

Discuss the basics of angles. Use a diagram on the board that shows different angles (acute, right, obtuse) and their measurements.

Exploring Complex Shapes

Examine complex shapes and polygons. Identify known angle measures and use them to deduce the missing angles.

Show diagrams of various polygons with and without some angle values. Ask the student to identify known angles and infer the missing ones.

Step-by-Step Problem-Solving

  1. Observe the diagram.
  2. Identify the known angle values.
  3. Calculate missing angles.
  4. Verify your solution.

Guide the student with a structured strategy for solving the puzzles. Emphasize a step-by-step approach: observe, calculate, and verify.

Interactive Angle Puzzle

Now, try to solve this angle puzzle. Apply your strategy and check your answers as you uncover the mystery of missing angles!

Launch an interactive segment where the student actively solves a puzzle. Encourage them to talk through their thought process.

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Quiz

Angle Puzzle Quiz

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