Find AC for the quadrilateral

The quadrilateral ABCD is an isosceles trapezoid, and the length of AC for the quadrilateral is 19 feet
The quadrilateral ABCD is an isosceles trapezoid
This means that:
From the above highlights, we have:
AC = 7ft + 12ft
Evaluate the sum
AC = 19 ft
Hence, the length of AC for the quadrilateral is 19 feet
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