A triangle has side lengths of 3x,4x and 5x. If the area of the triangle is 121.5cm2, use any appropriate method to determine the value of x.
p.s. the answer in the book is x=4.5 but i dont know how they got that.
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Answer: 1/2 × 4x×5x = 121.5 CM SQUARE
(2×5)x^2 = 121.5
10x2 is 121.5
X2 is 121.5/10
X^2 is 12.15
X= √12.15 =
Sorry my answer not matches with Ur answer
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