The value of the unknown length is 24
<h3>How to determine the
unknown length?</h3>
Represent the unknown length with x.
So, we have the following equivalent ratio:
30 : 30 + x = 25 : 45
Express as fraction
30/30 + x = 25/45
Simplify the fraction
30/30 + x = 5/9
Cross multiply
150 + 5x = 270
Evaluate the like terms
5x = 120
Divide by 5
x = 24
Hence, the value of the unknown length is 24
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The unknown number would be 11
738 + 164 = 902
902 / 82 = 11
Ans: 11
Since it's isosceles, ∠ABC = (180-30) / 2 = 75
Pretty sure it's A. (X times .5 equals Y)
The answer is B. Just multiply all of them then divide