Calculate the perimeter of a triangle with sides 9cm,12cm,15cm.An equilateral triangle with side 10.5cm.An isoclels triangle with equal sides 6.5cm nd the third side 3.8m.
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Answer:
perimeter of 1st ∆=36
perimeter of 2nd ∆=31.5
perimeter of 3rd ∆= 16.8
Step-by-step explanation:
w.k.d
perimeter of ∆ =sum of all sides
perimeter of equilateral ∆= 3×given side
perimeter of isoclels ∆=2×equal sides+third side
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