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.
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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.
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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
Step-by-step explanation:
triangle
20cm to 25 cm triangle semiperimetre