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Step-5

Title: Radius and daimeter of circle

Grade: 7-a Lesson: S1-L1

Explanation:

Step	Type	Explanation	Answer
1	Problem	The radius of the circle is 70cm. Find the diameter. $5$
2	Formula:	Diameter of a circle.	d = 2r
3	Step	Substitute 70 for r.	d = \$2\times(70)\$
4	Step	Multiply.	d = \$2\times(70)\$ d = 140
5		Answer	The diameter is 140cm.

Step

Type

Explanation

Answer

Problem

The radius of the circle is 70cm. Find the diameter.
$5$

Formula:

Diameter of a circle.

d = 2r

Step

Substitute 70 for r.

d = \$2\times(70)\$

Step

Multiply.

d = \$2\times(70)\$
d = 140

Answer

The diameter is 140cm.