The perimeter of your protractor in geometrical box ,whose radius is 3.5 cm is *
1 point
16cm
18 cm
20 cm
24cm
Answers
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second option = 18 cm
Step-by-step explanation:
Given:-
The radius of the protractor of the geometrical
box is 3.5 cm
To find:-
Find the perimeter of your protractor in
geometrical box ,whose radius is 3.5 cm
Solution:-
Radius of the protractor =3.5 cm
r = 3.5 cm
Protractor is in the shape of a semi circle
Perimeter of the protractor =
Perimeter of a semi circle
=πr +2r units
On Substituting the value of r = 3.5 cm in the
above formula
=>(22/7)×(3.5)+2(3.5) cm
=>(22/7)×3.5 + 7
=>22×0.5 +7
=>11+7
=>18 cm
or
Perimeter of a semi circle is 36r/7 units
=>(36/7)×3.5
=>36×3.5/7
=>36×0.5
=>18 cm
Perimeter = 18 cm
Answer:-
The Perimeter of the protractor for the given
problem is 18 cm
Used formula:-
- Perimeter of a semi circle=πr +2r units
- Perimeter of a semi circle is 36r/7 units
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