8cm !
A square's sides have equal lengths, and an equilateral triangle's sides also have equal lengths.
If an equilateral triangle is 3 centimeters long then the perimeter of the triangle is 9 centimeters. The perimeter is found by adding up the lengths of all the sides of an object.
A scalene triangle has sides of different lengths while an equilateral triangle has sides of equal lengths
A scalene triangle has 3 sides of different lengths An isosceles triangle has 2 sides of equal lengths An equilateral triangle has 3 sides of equal lengths
If it is and equilateral triangle, the perimeter is 12, otherwise it is impossible to figure out without any angle measurements or other sides lengths
equilateral
A triangle with sides that do not have equal lengths.
Perimeter is the sum of the sides. An equilateral triangle has three sides of equal length. So the perimeter in this case would be 7.8mm x 3 = 23.4mm.
you multiply one of the sides by three. The perimeter is the total length of the outside of the shape - in this case the total of the lengths of the three sides. You'll need to know the length of one side and an angle to calculate the lengths of the others in any triangle, however in an equilateral triangle all the sides are the same length so if you know one you know them all.
If it is an equilateral triangle with 3 equal sides of 4cm then its perimeter is 12cm
An equilateral triangle has 3 sides of the same lengths.
If the lengths of its 3 sides are equal then it is an equilateral triangle.