Find each missing measure, measure of angle 1,2,3,4

Step-by-step explanation:

∠1 is complementary to 15°, so is 90° -15° = 75°

∠2 completes the triangle with angles 49° and 75°, so is 180° -49° -75° = 56°

∠3 is supplementary to ∠2, so is 180° -56° = 124°

∠4 is complementary to 49°, so is 90° -49° = 41°

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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21/58.

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