In the morning, Harrison checked the temperature outside to find that it was −12℉. Later in the afternoon, the temperature rose 12℉. Write an expression representing the temperature change. What was the afternoon temperature?

I'm a bit puzzled here because they did not provide you with any measures of the other angles, so i am unable to provide a theorem or postulate to support my answer, but i'd say 90 degrees because it looks closer to a right angle than anything.

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