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.
20
11cm
Perimeter = 5*5 = 25 cm
If you're talking about a five sided figure, just add up your figures.
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! :)
Perimeter = 6cm + 6cm + 9cm + 9cm = 30cm
0cm
it is 81cm
5cm
find the perimeter and area of a rectangle that is 15cm long and 5cm wide
Pentagon has 5 sides Regular => each side 9cm => perimeter = 5 x 9cm = 45cm
200mm
The answer is, you can draw a rectangle with these measurements: 6cm and 9cm 5cm and 10cm 7cm and 8cm
135cm
5cm 2cm