the perimeter of an isosceles triangle is 40 centimetre. the base is the two third of the sum of equal sides. find the length of each side
Answers
Answered by
3
Step-by-step explanation:
let equal sides be X
base=2/3×2x=4/3x
X+4/3x=40
Answered by
2
Answer:
a+a+b=40
2a+b=40
2a=40-b
B=2/3(a+a) = 3b=80-2b
5b=80
B=18
2a=40-16
2a=24
A=12
S=40/2
=20cm
Area of angleABC = underroot 20(20-12)×(20-12)×(20-16)
=underoot20(8)×(8)×(4)
= 8×2×2underoot5
32root5
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