Basic tech construt 15,30,45, 90, 60, 221/2and 75
circumisirib a circle round the the triangleABC=AB=ACEB6 = 60 mm
Inscribe a circle in a given triangle of a side ABC when AB= BC and BC=AC= 50mm​

The image shows the evolution of a species of fish. a few fish from a population developed different social behaviors and evolved into different species. two fish according to the image, the fish underwent . the new species of fish had mating seasons that were different from that of the original fish. because of the differences in mating seasons, the fish underwent reproductive isolation. this mode of isolation would be .