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Procedimiento mediante la aplicación de triángulos notables.
cos(45)=x/6m
cos(45) * 6m = x
√2/2 * 6m = x
3 √2 m = x
respuesta: (B)
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c^2=h2 - c^2
c^2= (8cm)^2 - (3cm)^2
c^2= 64cm^2 - 9cm^2
c^2= 55cm^2
c= √55cm^2
c=7.41cm
At=área base* h /3
At= (6cm * 6cm) * 7.41cm/3
At= 36cm^2 * 7.41cm/3
At= 12cm^2 * 7.41cm
At= 88.92 cm^3
(89cm^3 aproximadamente)
respuesta: (B)
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p= 2cm
r= 5/4 p
r= 5/4 * 2cm
r= 10cm /4
r= 2.5cm
c^2= R^2 - P^2
c^2= (2.5cm)^2 - (2cm)^2
c^2= 6.25cm^2 - 4cm^2
c^2= 2.25cm^2
c= √2.25cm^2
c= 1.5cm
respuesta: (B)