Let us assume that,

Triangle ABD and ADE are inscribed in $\"\"$ F with $\"\"$ .

Given : Measure of $\"\"$ and measure of $\"\"$ .

From the diagram,

AED is a right angle because $\"\"$ is a semi circle.

From angle sun theorem.

$\"\"$

Substitute the values of $\"\"$ .

$\"\"$

$\"\"$ .