42%. It is opposite angles to the angel that says 42
Just a guess but 75 degrees?
X will be 8.49
the other side is 6 too
Length of AB = 18. 92
Length of AC = 26. 15
Length of BC = 32. 552
<h3>How to determine the sides of the triangle</h3>
Using the Pythagorean theorem, we have that

Expand the bracket

Collect like terms


Make x^2 subject



Thus,
Length of AB = 20x -2 = 20(1. 046) - 2 = 18. 92
Length of AC = 25x = 25* 1.046 = 26. 15
Length of BC = 12x + 20 = 12(1. 046) + 20 = 32. 552
Learn more about isosceles triangles here:
brainly.com/question/1475130
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