Question

Two sides of a triangle measure 20cm and 25cm . If the semiperimeter of the triangle is 32cm ,then the length of the third side is _ cm.​

Answer 1

Answer: 19

Step-by-step explanation:

We know semi perimeter = ½ of perimeter

So, 32 = ½ of perimeter

We can also say,

32*2 = perimeter

64 cm = perimeter

Let the third side be x

Now, 20 + 25 + x = 64

45 +x = 64

x = 65-45

x = 19

Answer 2

Step-by-step explanation:

triangle

20cm to 25 cm triangle semiperimetre