Pentagon has 5 sides Regular => each side 9cm => perimeter = 5 x 9cm = 45cm
Perimeter = 6cm + 6cm + 9cm + 9cm = 30cm
63 cmPerimeter = 2 x (Length + Width) = 2 x (9cm + 7cm) = 2 x 16cm = 32cm
9cm + 5cm + 9cm + 5cm = 28cm
31 centimeters
If you're talking about a five sided figure, just add up your figures.
any 2-D shape could have a perimeter of 9cm. One example is a square with sides of 9/4 cm.
The formula for perimeter is P=2XL+2XW which is Perimeter = 2 X length + 2 X Width. We want to replace L and W with the the numbers 9 and 5. I don't know which is which but lets say the 9 is the length and 5 is the width. So the new number sentence would be P=2X9+2X5. So now it's time to solve. 2X9=18. 2X5=10. 10+18=28. Your perimeter would be 28cm. Hope this helped! :)
Area = (length of a side)2 = 81 square centimeters Perimeter = 4 x (length of a side) = 36 cm.
The perimeter would be 8 + 9 + 10 = 27cm
28 cm
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.