Ni hua is an adventurous traveler. he skydives twice in every island he visits and skydives thrice in every peninsula he visits. in the last decade, ni hua went skydiving a total of 45 times in the 19 islands and peninsulas that he visited. how many islands and peninsulas did ni hua visit?

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.

u also answered this so i think u would know but i am here to

put in or use mine