The approximate value of b, rounded to the nearest tenth is 9.4 units
Triangular altitude theorem
From the given right angles triangle, we will have;
5/6 = 6/a
Cross multiply
5a = 36
a = 36/5
a = 7.2 units
Using the pythagoras theorem
b^2 = 6^2 + 7.2^2
b = 9.4 units
Hence the approximate value of b, rounded to the nearest tenth is 9.4 units
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