The perimeter of an isosceles triangle is 20cm. If one of the equal sides is 4¾cm
long ,find the measure of the third
side.
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Answer:
Semi perimeter = (10+13+13)/2 = 18
area = √{18(18-10)(18-13)(18-13)}
= √(18×8×5×5)
= √(2×3×3×2×2×2×5×5)
=2×2×3×5
=60
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