Area of a Regular Polygon
Presentation
•
Mathematics
•
6th Grade
•
Practice Problem
•
Medium
Standards-aligned
Nancy McGary
Used 221+ times
FREE Resource
7 Slides • 10 Questions
1
Area of a Regular Polygon
Objective: Students will be able to identify regular polygons and find the area using congruent triangles.
2
What is a polygon?
Straight sided, flat shapes that are closed
Comes from the Greek word meaning “many angles”
3
What is a Regular Polygon?
all sides are the same lengths (congruent)and all angles have the same measurements.
4
Multiple Choice
5
Multiple Select
6
How can you find the area of a regular polygon?
Divide the polygon into congruent triangles
The number of triangles will be the same as the number of sides.
7
Step 1: Make congruent triangles
Draw a from each vertex into the center
The vertex is where 2 line segments meet.
Make a dot in the center of the figure and connect it to each vertex.
8
Multiple Choice
9
Multiple Choice
10
Step 2:Find the area of one triangle.
Remember A=1/2BH
Don't forget to multiply by half or divide by 2.
11
Multiple Choice
What is the area of the triangle that has a 4in base and 10 in height?
12
Multiple Choice
13
Step 3: Find the area of the regular polygon
Take the area you found from 1 congruent triangle and multiply it by the number of sides.
14
Multiple Choice
What is the area of the triangle in this polygon?
15
Multiple Choice
How many sides does this figure have?
16
Multiple Choice
If the area of the triangle in this figure is 28cm2, what is the area of the whole figure?
17
Multiple Choice
Find the area of the regular polygon.
Area of a Regular Polygon
Objective: Students will be able to identify regular polygons and find the area using congruent triangles.
Show answer
Auto Play
Slide 1 / 17
SLIDE
