9+9+9 = 27 cm
This is not an equilateral triangle.
Pentagon has 5 sides Regular => each side 9cm => perimeter = 5 x 9cm = 45cm
any 2-D shape could have a perimeter of 9cm. One example is a square with sides of 9/4 cm.
Area 51.
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.
This is not an equilateral triangle.
No because the 3 sides of an equilateral triangle are equal in length
Yes, it is possible for a triangle to have sides with lengths of 9 cm, 9 cm, and 9 cm. This is known as an equilateral triangle, where all sides are equal in length.
Pentagon has 5 sides Regular => each side 9cm => perimeter = 5 x 9cm = 45cm
All you do is add the sides up for the perimeter. 12 + 10 + 9 = 31
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
Area = 1/2 (base x height) If the triangle is sitting on the 9cm side, then 72 = 1/2 ( 9 x height ) Height = 16 cm There are an infinite number of ways to draw the remaining two sides such that the height of the triangle is 16 cm. So the given information doesn't define a unique perimeter.
Area 51.
No
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.
So?