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Question

In triangle ABC, given below, AB = 8 cm, BC = 6 cm and AC= 3 cm. Calculate the length of OC.


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Solution

Let us assume, AO = y and OC = x
Using Pythagoras theorem, In a Right-angled triangle AOC we have
AO2 + OC2 = AC2
y2+x2=32
y2 = 9 − x2

Using Pythagoras theorem, In a Right-angled triangle AOB we have
AO2 + OB2 = AB2
y2 + (x + 6)2 = 82
9 − x2 + x2 + 12x + 36 = 64
12x + 45 = 64
12x = 64 – 45 = 19
x = 1.58 cm
Hence OC = 1.58 cm


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