Distance on a
Coordinate Plane
Warm-up Activity (5 mins)
Work with your seatmate and answer the
activity sheet to be provided. Then check
your answers with the other pairs in your
class.
Answers:
Objectives:
At the end of the lesson, you will be able to:
 Use the Pythagorean Theorem to find
distances between two points on a
coordinate plane.
 Use the Distance Formula to find an
unknown distance.
The Pythagorean Theorem
Let’s use the Pythagorean
Theorem to find a distance!
7
5
a2
+b2
=c2
(5)2
+(7)2
=c2
25 + 49 =c2
74 =c2
Try this one using the
Pythagorean Theorem!
Answer:
The Distance Formula
2 2
2 1 2 1
( ) ( )
d x x y y
   
Example 1:
Example 2:
Example 3:
Main Activity (15 mins)
• Work individually on the problem
assigned to you.
Answers:
Blue: 3.6 units
Yellow: 1.4 units
Green: 13.6 units
Assess yourself! (10 mins)
• Kahoot!

Lesson 5.7 Distance on a Coordinate Plane.pptx