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2.4cm ? 7cm ? Determine the surface area given r=2.4cm & h=7cm. S=2π S=2πr2+2πrh remember show substitution and multiplication using brackets - e.g. rh=(2.4)(7) = cm2 2 +2π 4cm ? 6.8cm ? Determine the surface area given l=4cm & h=6.8cm. S=2 S=2l2+4lh = 2 +4 cm2 5.2cm ? 6cm ? 10cm ? Determine the surface area given b=6cm, h=5.2cm & l=10cm S=3 S=3bl+bh = cm2 + 7cm ? 5cm ? 1.1cm ? S=2 Determine the surface area given l=7cm, w=5cm & h=1.1cm S=2lw+2wh+2lh = +2 cm2 +2 0.77m ? 24cm ? Determine the surface area given d=24cm & h=0.77m. S=2πr2+2πrh S=2π r= = cm 2 +2π cm2 h= cm 101cm ? 1.2m ? Determine the surface area given l=101cm & h=1.2m. S=2l2+4lh S=2 l= = m 2 m2 +4 h= m 2.5m ? 87cm ? 100cm ? Determine the surface area given b=100cm, h=87cm & l=2.5m S=3 S=3bl+bh b= = m m2 + h= m 18cm ? 75mm ? 45mm ? Determine the surface area given l=75mm, w=45m & h=18cm S=2lw+2wh+2lh l= S=2 = cm cm2 w= +2 +2 cm |