Question

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Answer 1

Answer:

angle ABC =70°

alternate interior angles in a line PQ are parallel with RS.

Step-by-step explanation:

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Answer 2

Step-by-step explanation:

Step-by-step explanation:angleB+angleC =angle 70 ....sum of two interior angles is equal to opposite exterior

Step-by-step explanation:angleB+angleC =angle 70 ....sum of two interior angles is equal to opposite exterior B=80-70

Step-by-step explanation:angleB+angleC =angle 70 ....sum of two interior angles is equal to opposite exterior B=80-70B=10