Question

(b)
Given that the lines in the picture below marked with arrows are parallel, determine the sum of
the angles a+b+c without measuring. Show your work or otherwise explain your answer. Hint:
You will probably need to extend or add more lines to this drawing.
a

Answer 1

Step-by-step explanation:

through angle b ,draw a line parallel to other 2 lines then using sum of co interior angles is equal to 180°

we can write a+b'=180° and c+b"=180°

adding above equations

a+(b'+b")+c=180+180

a+b+c=360°