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 would be an equilateral triangle with three equal sides. It would also be equiangular, with three equal angles, each measuring 60 degrees.
Pentagon has 5 sides Regular => each side 9cm => perimeter = 5 x 9cm = 45cm
Well, honey, making a shape with a perimeter of 9cm is as easy as pie. You could have a triangle with sides measuring 3cm, 3cm, and 3cm. Or you could have a rectangle with sides measuring 2cm and 2.5cm. Just remember, the perimeter is the sum of all the sides, so get those measuring tapes out and get creative!
To draw a shape with a 9cm perimeter, you can create a triangle, square, or rectangle. For a triangle, you could have sides measuring 3cm, 3cm, and 3cm. For a square, all four sides would be 2.25cm. For a rectangle, two sides could be 2cm and the other two sides could be 2.5cm. These shapes will all have a perimeter of 9cm.
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.
To determine if these three sides form a right triangle, we can use the Pythagorean theorem. In a right triangle, the square of the length of the hypotenuse (the side opposite the right angle) is equal to the sum of the squares of the other two sides. In this case, we have 6^2 + 9^2 = 36 + 81 = 117 and 12^2 = 144. Since 117 is not equal to 144, these three sides (6cm, 9cm, 12cm) do not form a right triangle.