SaiBook.us Geometry

Home Course Section

Schedule Admission Social

Step-1

Title: Area of Circle

Grade: 6-a Lesson: S2-L1

Explanation: Hello Students, time to practice and review the steps for the problem.

Lesson Steps

Step	Type	Explanation	Answer
1	Problem	If the longest chord of a circle is 22 m, then find the area of a circle.
2	Step	The given values are	Longest chord (d) = 22 m
3	Formula	The area of circle	\$A = πr^2\$
4	Hint	Here the radius	\$r = d/2\$
5	Step	Substitute the values	\$r = 22 /2\$ r = 11
6	Step	Now Substitute the values in the formula	\$A = π(11)^2\$
7	Step	After simplification	\$A = 3.1415 \times 121\$
8	Step	After simplification	A = 380.12 sq.m
9	Step	The area of a circle is 380.12 sq.m
10	Answer	Option	C
11	SumUp	Can you summarize what you’ve understood in the above steps?	Audio

Step

Type

Explanation

Answer

Problem

If the longest chord of a circle is 22 m, then find the area of a circle.

Step

The given values are

Longest chord (d) = 22 m

Formula

The area of circle

\$A = πr^2\$

Hint

Here the radius

\$r = d/2\$

Step

Substitute the values

\$r = 22 /2\$

r = 11

Step

Now Substitute the values in the formula

\$A = π(11)^2\$

Step

After simplification

\$A = 3.1415 \times 121\$

Step

After simplification

A = 380.12 sq.m

Step

The area of a circle is 380.12 sq.m

Answer

Option

SumUp

Can you summarize what you’ve understood in the above steps?

Audio