Find angle A and angle B

Ello, estoy aquí para ayudar, pero hablo español, con suerte, entenderás que lo estoy intentando.

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<A=100°

<B=105°

Step-by-step explanation:

Assuming AB is parallel to DC,

<B=180-75=105

<A=180-80=100

step-by-step explanation:

you can add the two numbers and divide the result by 2. or you can find the gap between the two numbers and add half of this to the smaller number.

there is no following? ! lol