Question

Calcula el área de los círculos que tienen los
siguientes radios: a) r = 7 cm b) r = 10 cm c) r = 15 cm

d) r = 8,5 cm e) r = 17 cm f) r = 21 cm

g) r = 30 cm h) r = 42 cm i) r = 50,5 cm

Answer 1

Respuesta:

a) $A=\pi *r^{2}$    entonces $A=\pi *(7cm)^{2} =\pi *49cm^{2}$≈$153,938040026 cm^{2}$

b) $A=\pi *r^{2}$ entonces $A=\pi *(10cm)^{2} =\pi *100cm^{2}$≈$314,159265359cm^{2}$

c) $A=\pi *r^{2}$ entonces $A=\pi *(15cm)^{2} =\pi *225cm^{2}$≈$706,858347058cm^{2}$

d) $A=\pi *r^{2}$ entonces $A=\pi *(8,5cm)^{2} =\pi *72,25cm^{2}$≈$226,980069222cm^2$

e) $A=\pi *r^{2}$ entonces $A=\pi *(17cm)^{2} =\pi *289cm^{2}$≈$907,920276887cm^{2}$

f) $A=\pi *r^{2}$ entonces $A=\pi *(21cm)^{2} =\pi *441cm^{2}$≈$1385,44236023cm^{2}$

g) $A=\pi *r^{2}$ entonces $A=\pi *(30cm)^{2} =\pi *900cm^{2}$≈$2827,43338823cm^{2}$

h) $A=\pi *r^{2}$ entonces $A=\pi *(42cm)^{2} =\pi *1764cm^{2}$≈$5541,76944093cm^{2}$

i) $A=\pi *r^{2}$ entonces $A=\pi *(50,5cm)^{2} =\pi *2550,25^{2}$≈$8011,84666482cm^{2}$

Explicación paso a paso: