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Step-4

Title: Radius and daimeter of circle

Grade: 7-a Lesson: S1-L1

Explanation:

Step	Type	Explanation	Answer
1	Problem	The diameter of the circle is 200cm. Find the radius. $4$
2	Formula:	Radius of a circle.	r = \$d/2\$
1	Step	Substitute 200 for d.	r = \$\frac{200}{2}\$
2	Step	Divide.	r = \$\cancel{200}^100/\cancel{2}^1\$ r = 100
3		Answer	The radius is 100cm.

Step

Type

Explanation

Answer

Problem

The diameter of the circle is 200cm. Find the radius.
$4$

Formula:

Radius of a circle.

r = \$d/2\$

Step

Substitute 200 for d.

r = \$\frac{200}{2}\$

Step

Divide.

r = \$\cancel{200}^100/\cancel{2}^1\$

r = 100

Answer

The radius is 100cm.