¿Cual es el espeje correcto de "r" en la formula A = [tex] \ pi [ / tex] x [tex] r ^ {2} [ / tex] ?
¿Cual es el espeje correcto de "r" en la formula A = [tex] \ pi [ / tex] x [tex] r ^ {2} [ / tex] ? A) r = [tex] \ frac{A}{2} + \ pi [ / tex] b) r = [tex] \ sqrt{ \ frac{A}{ \ pi} } [ / tex] c) r = [tex] \ sqrt{ \ frac{ \ pi}{A} } [ / tex] d) r = 2A[tex] \ pi [ / tex].