SOLUTION: In an isosceles trapezoid ABCD, the smaller base is AB, AE and BF are altitudes drawn to side DC. If AE=7ft and DE=8ft, find angle D to the nearest degree. Then find AD using trigo

Question 1106105: In an isosceles trapezoid ABCD, the smaller base is AB, AE and BF are altitudes drawn to side DC. If AE=7ft and DE=8ft, find angle D to the nearest degree. Then find AD using trigonometric ratios. Round AD to the nearest unit.

I got that angle D equals 41 degrees, but I am not sure how to find AD using trigonometric ratios?????
Answer by KMST(5328) (Show Source): You can put this solution on YOUR website!
I agree that to the nearest degree .
From there, you could use the trigonometric ratios or .
You could say that

and using the approximate value

(rounded)
To the nearest unit .

The problem makes sense if you are only able to use trigonometric value tables,
just like I did before Hewlett Packard started selling calculators.
With a calculator, you could give your answers with more decimal places,
and you may even be tempted to calculate AD using the Pythagorean theorem, as

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