Best Answer

Pentagon has 5 sides

Regular => each side 9cm

=> perimeter = 5 x 9cm = 45cm

Q: What is the perimeter of a regular pentagon with 9cm sides?

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any 2-D shape could have a perimeter of 9cm. One example is a square with sides of 9/4 cm.

Area 51.

This is not an equilateral triangle.

No. The sum of the lengths of any two sides of a triangle must be greater that the third. Here 6 + 9 = 15, not > 15.

Area = 0.5*base*height Note that the given dimensions would not form a triangle

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Perimeter = sum of the lengths of sides = 5* 7 cm = 35 cm

It would be 63cm. There are 7 sides and each side is 9cm so 7 times 9 is 63.

any 2-D shape could have a perimeter of 9cm. One example is a square with sides of 9/4 cm.

Perimeter = 6cm + 6cm + 9cm + 9cm = 30cm

An arbitrary large number is the answer for anyrectangle, up to that with a length of 9cm, and 0cm as the width will have a perimeter of 18cm.Similarly, any rectangle up to that with sides 0cm long, and a width of 9cm will have your 18cm perimeter.

it is 81cm

9cm + 5cm + 9cm + 5cm = 28cm

ok if the perimeter is 36cm and it is a square then you know all four sides are equal 36cm / 4sides = 9cm for each side A = L * W ( both the length and width are 9cm because each side is equal ) A = 9cm * 9cm A = 81cm2

All you do is add the sides up for the perimeter. 12 + 10 + 9 = 31

31 centimeters

If you're talking about a five sided figure, just add up your figures.

you cant do that becaues to get a perrimetr you need to add all the sides. when you do that it wll either be less then 9 or more then 9 in conclusion you cant get a shape that has a perimeter of