Lesson 8 What is an Inch?
Let’s measure in inches.
Warm-up Notice and Wonder: Inches and Centimeters
What do you notice? What do you wonder?
Activity 1 What is an Inch?
Find 2 items that are about an inch long.
Measure the length of each object.
object to measure
length in inches
marker
colored pencil
11 connecting cubes
a book
your choice objects:
Activity 2 Measure the Sides of Shapes
Problem 1
Here is a rectangle.
How long is the long side of the rectangle in inches?
Estimate:
Measure the long side of the rectangle.
Actual length:
Problem 2
Here is a square.
How long is a side of the square in inches?
Estimate:
Measure one side of the square.
Actual length:
Problem 3
Here is a triangle.
How long is the longest side of the triangle in inches?
Estimate:
Measure the longest side of the triangle.
Actual length:
Practice Problem
Problem 1
What do you know about inches?
What is the length of the rectangle in inches?