In triangle abc, an altitude is drawn from vertex c to the line containing ab. the length of this altitude is h and h=ab. which of the following is true? i. triangle abc could be a right triangle. ii. angle c cannot be a right angle. iii. angle c could be less than 45 degrees.

II. Angle C cannot be a right angle.

III. Angle C could be less than 45 degrees.

answer rather than having to add and subtract the measurements of the semi-circle, notice that the semicircle to the left of ad is actually identical in area to the blank semicircle-shaped space to the left of bc. so if we transferred the red semicircle into the blank space, we would end up with a square of side length 24 cm. the area of a square is s^2 = 24^2 = 676 cm^2.

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