Find the value of angle A and angle B

hello

so these angles you can apply the "vertically opposite angles are equal" rule

angle "A" is vertically opposite to 138º so therefore angle "A" is 138º

angle "B" is verticall opposite to 42º so therefore angle "B" is 42º

hope this helped and have good day :)

step-by-step explanation:

this is not possible to solve with the info given.   you need at least an one angle somewhere.

the answer is su.k.my? ? co.kc