Subtract the two side lengths from the perimeter.
The perimeter of a triangle is just the length of the 3 sides added together.
Eg.
Q: A triangle has a perimeter of 20 m. One side is 5m and another is 10m. How long is the 3rd side?
A: Perimeter - side 1 - side 2 = side 3
Side 3 = 20 - 5 - 10 = 5 m
If you have the length of each of the three sides of a triangle, you can find the perimeter of (the distance around) the triangle by adding the length of the sides. Their sum will be the perimeter of this geometric shape.
The perimeter of a polygon is the sum of the length of each of its sides. If the polygon is a regular polygon the you can calculate the perimeter as [number of sides] *[the length of one side]
An isosceles triangle is a triangle that has two sides of equal length.
A Scalene triangle has no sides of equal length.
The kind of triangle with two sides the same length is an isosceles triangle.
By adding the length of all the sides.
it depends on the triangle.if it is a "pure" triangle (symetrical on all sides) then the permeter is 9
If you have the length of each of the three sides of a triangle, you can find the perimeter of (the distance around) the triangle by adding the length of the sides. Their sum will be the perimeter of this geometric shape.
equal lateral
The perimeter of a polygon is the sum of the length of each of its sides. If the polygon is a regular polygon the you can calculate the perimeter as [number of sides] *[the length of one side]
An isosceles triangle is a triangle that has two sides of equal length.
An isosceles triangle is a triangle with two sides of equal length.
You can find the permeter if you know the length of the sides. You need to add the lengths of all the sides together.
If only two sides of a triangle are the same length it is an isosceles triangle. If all three sides are the same length it is an equilateral triangle.
No sides of a scalene triangle are the same length.
The length of the third side must be greater than the difference between the length of the two given sides and it must be less than the sum of the two given sides. These limits can be derived from the fact that any two sides of a triangle must have a combined length greater than the third side.
If all of its sides are the same length its an equilateral triangle. If only two of its sides are the same length it is an isosceles triangle. If all the sides are different lengths it is a scalene triangle