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Published byRalph Leeson Modified over 3 years ago

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Surface Area of a Cylinder By Mr. Martin

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Overview Behold!Behold! A can with a: –Top (radius 3.75 cm) –Bottom (same as top), and –Label (11 cm high) Note: these are not the actual Measurements of the can.

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The Top Radius (r) Formula for Area Circle? Area = Pi x r 2 Area= Pi x 3.75 2 Area=3.14 (14.0625) Area=44.15625 sq cm

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The Bottom Same as top Area = Pi x r 2 Area= Pi x 3.75 2 Area=3.14 (14.0625) Area=44.15625 sq cm

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What shape? –rectangle Formula for area? –Height x width Height? –11cm The Label Width? – –Pi x Diameter Area = 11(3.14)(7.5)= 259.05 sq cm Width Height

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Add Top, Bottom and Label 44.15625 + 44.15625 + 259.05 = 347.3625 square cm Top Bottom

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Now you try: Radius = 5 cm Height = 12 cm Note: These are not the actual dimensions of the can.

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20) 108° 21) 80° 22) 70° 23) 123° 24) 38° 25) 167° 26) 10° 27) 154° 28) 105 = 2x – 11; x = 58 29) 6x + 19 + x = 180; x = 23.

20) 108° 21) 80° 22) 70° 23) 123° 24) 38° 25) 167° 26) 10° 27) 154° 28) 105 = 2x – 11; x = 58 29) 6x + 19 + x = 180; x = 23.

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