The diagram below shows alternating equilateral triangles and regular pentagons. If the pattern is continued, the heavy line shown will eventually form a complete regular polygon. How
many sides will this regular polygon have?

P.S the diagram is badly drawn, don’t come at me

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I'm not entirely sure since we didn't learn this in class yet but I would say that Linear Pair Postulate goes with the ABC=135. Which leaves the subtraction Property of Equality for the last one. The reasoning I have for choosing that answer is becasue it made the made the most sense to me becasue the problem gives us the Linear Pair Postulate for BCD and I just thought that ABC = 135 was the other Linear Pair Postulate.