How to prove that two angles are complementary when two lines are perpendicular to each other?

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You have 2 sides that are 2 cms and you have 6 sides that are 1/2 cm and you have 4 sides that are 1 cm. the smallest sides are 1/2 the medium sized sides are 1 and the smallest are 1/2. so to find the perimeter you have to add them all up together so your answer will be 11 cm's

What am i doing here. add?

Ithink is a. true, but not sure