The perimeter of the triangle with 5cm difference on each side is 120cm. How many cm is the shortest side?

The perimeter of the triangle with 5cm difference on each side is 120cm. How many cm is the shortest side?

One side of the shortest side x cm
x+x+5+x+5*2=120
3x=105
x=35

It is known that the lengths of each side of a triangle are 4cm, 5cm and 8cm respectively. What is the circumference of the triangle with the midpoint of each side as the vertex

8.5cm

If the two sides of a triangle are 5cm and 8cm respectively, its perimeter is at most < > cm and at least < > cm {the third side is the whole centimeter}

According to the sum of the two sides of the triangle is greater than the third side, and the difference between the two sides is less than the third side, we can know that the third side should be greater than 3cm and less than 13cm, and the third side is an integer, so the perimeter of the triangle should be greater than (5 + 8 + 4) = 17cm and less than (5 + 8 + 12) = 25cm