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Area and Perimeter

Use clear models, tools, and units to measure area and perimeter of rectangles.

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Beginner 15–20 minutes Measurement & Data
Measurement & Data Page 12 of 16
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At a Glance

Area and Perimeter
Binder SectionMeasurement & Data
DifficultyBeginner
Estimated Time15–20 minutes
PrerequisitesNone
Essential Question

How can a diagram, measuring tool, or data display help us measure area and perimeter of rectangles?

Visual Model
4Thousands 3Hundreds 2Tens 7Ones

4,327 = 4,000 + 300 + 20 + 7

Goals

Learning Targets

  • I can identify what is being measured or organized.
  • I can choose and label a model that matches the situation.
  • I can solve, include the correct unit, and explain why my answer makes sense.
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Interactive Vocabulary

Reveal one step at a time

Worked Examples

Example 1

Find area and perimeter of a 6-by-4 rectangle

1

Area counts square units: 6 × 4 = 24 square units.

Notice and correct

Common Misconceptions

Starting a ruler away from zero

Align one endpoint with zero before reading the other endpoint.

Mixing units

Use one unit throughout or convert before calculating.

Ignoring a graph scale

Read what each interval or symbol represents.

Giving a number without a unit

Label centimeters, minutes, cents, square units, cubic units, or the correct category.

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Algebraic Models and Functions

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Warm-Up Guided Independent Challenge
1
Quick Start

Warm-Up

Warm-up 1

Directions: Study the measurement or data display. Label the unit or scale, show your thinking, and enter the final answer.

What is the area of a 5-by-3 rectangle?

Picture the area and perimeterUse the picture to organize what you know before you solve.
5 units3 units

Choose how you want to work or answer.

2
We Do

Guided Practice

Guided 1

Directions: Follow the steps. Build or read the matching visual, label every value and unit, write an equation when needed, and solve.

What is the perimeter of an 8-by-2 rectangle?

Picture the area and perimeterUse the picture as you work through each step.
5 units3 units

Choose how you want to work or answer.

3
You Do

Independent Practice

Independent 1

Directions: Choose the correct tool or display, show each step, include units, and enter your final answer.

Draw two rectangles with area 24 but different perimeters.

Picture the area and perimeterUse the picture to organize what you know before you solve.
5 units3 units

Choose how you want to work or answer.

4
Stretch Your Thinking

Challenge & Real-World Practice

🧩 Challenge

Design two rectangles with area 72 square units but different perimeters. Explain why equal area does not require equal perimeter.

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Success Criteria

Before you begin, I can…

  • I can select a model that matches the exact question.
  • I can read or use a measurement unit and scale correctly.
  • I can explain and check my result.
1
Question 1

What belongs with every measurement?

2
Question 2

What should you check before reading a graph?

3
Question 3

Why must a visual match the question?

4
Question 4

What makes an answer precise?

5
Question 5

How can you check a measurement result?

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Lesson Complete

Great job on Area and Perimeter!

You reviewed the lesson, practiced the skill, and completed the mastery check.

Next Lesson: Scaled Graphs → Back to Binder Topics

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