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Answer:
length of altitude is 16.8cm
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nikkoakao:
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Answered by
0
Answer:
16.8 cm
Step-by-step explanation:
Given, sides are 28cm,21cm and 35cm.
Semi-perimeter of triangle s = (28 + 21 + 35)/2
= 42 cm.
Area of triangle = √s(s-a)(s-b)(s-c)
= √42(42-28)(42-21)(42-35)
= √86436
= 294 cm.
Area of triangle = (1/2) * base * altitude
294 = (1/2) * 35 * altitude
588/35 = altitude
altitude = 16.8 cm.
Therefore, longest side of the triangle is 16.8cm
hope it helps you
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