Area and perimeter in the coordinate plane I
Find the perimeter and area of polygons graphed on a coordinate plane.
Do this: Read the concept below, then try the quiz or activity.
Lesson 170 of 192
88%
Concept
To find the side lengths of a polygon on a coordinate plane, use the distance formula. For horizontal and vertical line segments, simply subtract the x- or y-coordinates. Then, use those side lengths to calculate area and perimeter.
Try it
A rectangle has vertices at (-2, 3), (4, 3), (4, -1), and (-2, -1). Find its area and perimeter.
Common Misconception
Always verify your result in context instead of trusting a first pass.
Steps to find area and perimeter
These steps are out of order — can you fix them?
1.Calculate area by multiplying base times height
2.Calculate perimeter by adding all side lengths
3.Find the lengths of the horizontal and vertical sides
4.Plot the given vertices on the coordinate plane
Short Answer
Why is it easiest to find the distance of horizontal or vertical line segments?
Mastery Check
Pass this check with at least 80% to unlock completion.
Pass the mastery check (80%+) to unlock completion.