Area and Properties of Polygons

Area and Properties of Polygons

Assessment

Interactive Video

Mathematics

9th - 10th Grade

Hard

Created by

Thomas White

FREE Resource

The video tutorial explains how to calculate the area of an inscribed regular 2n-gon within a circle of radius R. By decomposing the polygon into triangles, the area of the 2n-gon is determined as 2n times the area of one triangle. The tutorial further explores the relationship between the area of the 2n-gon and the circle, showing that as n approaches infinity, the area of the circle is R/2 times its circumference, leading to the formula for the area of a circle: πR².

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6 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the first step in calculating the area of an inscribed regular 2n-gon?

Divide the polygon into squares

Decompose the polygon into triangles

Calculate the circumference of the circle

Find the diameter of the circle

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How is the area of the regular 2n-gon related to the triangles?

It is half the area of one triangle

It is twice the area of one triangle

It is equal to the area of one triangle

It is 2n times the area of one triangle

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the side length of the inscribed regular n-gon denoted as?

S

2n

n

R

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How is the area of the regular 2n-gon expressed in terms of the perimeter of the n-gon?

R over 2 times the perimeter

R times the perimeter

2R times the perimeter

R squared times the perimeter

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What happens to the 2n-gon and n-gon as n approaches infinity?

They approach the circle

They become larger

They remain unchanged

They become smaller

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the formula for the area of a circle derived in the video?

2πR²

2πR

πR

πR²