En un año reciente, un 19.4% de todos los doctores registrados eran mujeres. Si ese año había 56200 doctores registrados que eran mujeres, ¿cuál era el número total de doctores registrados?

The figures below are made out of circles, semicircles, quarter circles, and a square. find the area and the perimeter of each figure and give your answers as a completely simplified exact value in terms of π (no approximations).

Write the sine and cosine values of a, b, respectively, in the figure for (1) and (2) + explanation.

Which of these tools or constructions is used to inscribe a hexagon inside a circle?