Unit 3, Lesson 10
Rectangles and Triangles with Fractional Lengths
Accelerated 6
Preparation
Lesson Narrative
In this lesson, students solve problems about the area of rectangles and triangles with fractional side lengths.
First, students solve a contextual problem about finding the length of a rectangular tray whose area and width are known. They are also asked to find the number of rectangular tiles—which have fractional side lengths— that can cover the tray completely. Solving these problems prompts students to apply their understanding of division of fractions.
Next, students find the area of a triangle given a pair of base and corresponding height measurements. They also calculate an unknown base or height given the other two measurements.
- Calculate one side length of a rectangle given its area and the other side length.
- Calculate the base or the height of a triangle given its area and the other measurement.
Let’s explore rectangles and triangles that have fractional measurements.
Required Materials
Activity 2
Required Preparation
Consider preparing -inch square stickers, -binder clips, and -inch paper clips available for students to verify their answers.