Answer: 4. 432 cm^2/2 = 216 cm^26. 309.76 mm^28. pi * 22^2 = 484pi (or, approximately 1,519.76) in^2484/2 = 242pi or 759.88 in^2.10. 297.84 in^2/2 = 148.92 in^2Step-by-step explanation:To find the area of a triangle, you take the base and multiply by the height, and then divide by 2. Hence giving me the answers I obtained in #4 and #10.A square is equal on all sides, so you would just square the measurement of the one side.To find the area of a circle, you would do pi times the radius^2. Since this is a semicircle, you actually should divide the number you got by 2. (Which is why I did so up above)....

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