Calculating Area of Polygons
Grade 11 · Math · 52 min
What's Included
Learning Objective
I can calculate the area of regular polygons using given formulas.
Warm-Up Video
Florida PASS Program · 9:11
Area of a regular polygon 2
Guided Notes
3 key concepts
- 1
The formula for the area of a regular polygon is Area = ½ * apothem * perimeter, where the apothem is the distance from the center to a side at a right angle.
- 2
To find the area of a regular polygon, you can multiply ½ * apothem * perimeter, where the perimeter is the sum of all the sides, or the side length multiplied by the number of sides.
- 3
When solving for a missing variable, such as the apothem, plug in the known values into the formula Area = ½ * apothem * perimeter and solve the resulting equation using algebraic methods.
Practice Questions
11 questions · Short answer
Exit Ticket
Quick comprehension check
“A regular decagon (10 sides) has side length 12 ft and total area 900 ft². Use the formula A = 1/2 × apothem × perimeter to find the apothem a. Show all steps and include units.”
Complete Lesson Package
Get all 3 ready-to-use resources:
