Question

calculate the angles marked with letters ​

Answer 1

HERE IS YOUR ANSWER

We know that the angle made by the semicircle

is 90

Thus, A + B = 90 ----------. (1)

Now if we draw the chord which is making the angle 104

Then we can see that, the other angle made by the chord is A

Thus the angle A =

$\huge \red{ \frac{104}{2} }$

$\huge \pink{ = 52}$

SIMILARLY

FROM (1)

A + B = 90

THUS B = 90 - 52 = 38

$\huge \red {a = 52 \: \: b = 38}$