Lesson 16When Is the Same Size Not the Same Size?
Learning Goal
Let’s figure out how aspect ratio affects screen area.
Learning Targets
I can apply what I have learned about the Pythagorean Theorem to solve a more complicated problem.
I can decide what information I need to know to be able to solve a real-world problem using the Pythagorean Theorem.
Warm Up: Three Figures
Problem 1
How are these shapes the same? How are they different?
Activity 1: A 4:3 Rectangle
A typical aspect ratio for photos is
Problem 1
What does it mean that the aspect ratio is
Problem 2
If the shorter side of the rectangle measures 15 inches:
What is the length of the longer side?
What is the length of the rectangle’s diagonal?
Problem 3
If the diagonal of the
Problem 4
If the diagonal of the
Activity 2: The Screen Is the Same Size … Or Is It?
Problem 1
Before 2017, a smart phone manufacturer’s phones had a diagonal length of 5.8 inches and an aspect ratio of