Find the angles

∠1 = ° ∠2 = °
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Which best explains why this triangle is or is not a right triangle?

The center of the circumscribed circle lies on line segment and the longest side of the triangle is equal to the of the circle.

Graph the line that represents a proportional relationship between d and t with the property that an increase of 33 units in t corresponds to an increase of 44 units in d. what is the unit rate of change of dd with respect to t? (that is, a change of 11 unit in t will correspond to a change of how many units in d? )