its the same as all other side lengths
They must all be the same length.
Perimeter of a figure means the sum of the lengths of all the sides.A square has four sides, and in this case, the square's sides' lengths are 21 in.21 in. * 4 sides = 84 in.
Only if they are congruent triangles
A square has vertices which form 90 degree angles. Four of these can meet at a point and cover 360 degrees. This ensures than there are no wedge shaped gaps or overlaps at the points where the tessera meet. Also, the side lengths are all the same, so there are no gaps or overlaps along the side lengths.
its the same as all other side lengths
A square is a rectangle in which all side lengths are the same.
They must all be the same length.
yes
Square
A pentagon has five side and the lengths do not all have to be the same, apentagon which ahs all five side the same is sometimes called a "true pentagon"
Perimeter of a figure means the sum of the lengths of all the sides.A square has four sides, and in this case, the square's sides' lengths are 21 in.21 in. * 4 sides = 84 in.
Since all four sides of a square have the same length, you can multiply the length of one side by four. You can also just simply add the lengths of all four sides together.
Only if they are congruent triangles
Perimeter of a figure is the sum of its side lengths. In a square, all four sides are the same length. So, the perimeter of a square whose side length is 8.5 is 4 x 8.5 = 34.
They must not all be equal.
Angle Classifications:Obtuse (1 angle >90 degrees)Acute (all 3 angles