<span>Use the Pythagorean theorem for the right triangle

where

is the hypotenuse of the triangle;

and

are the other two sides.
So,

</span>
The triangle sum theorem says all 3 interior angles must equal 180 degrees.
so, 43 + 35 = 78. [ 180 - 78 = 102 degrees for the missing angles shared by the 2 triangles.
102 + 18 = 120. [180 - 120 = 60}
leaving the measure of Angle A as 60 degrees.
The interest would be $123.5
I believe it's a segment.
Answer:
8.75
Step-by-step explanation: