Surface area Review. Example CUBE Area of one face: 5² = 25 SA= (6)(25) SA= 150 m² Find the Surface Area.

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Presentation transcript:

Surface area Review

Example CUBE Area of one face: 5² = 25 SA= (6)(25) SA= 150 m² Find the Surface Area

Example  The area of one base of a triangular prism is 18 square feet. The perimeter of the triangular base is 19 feet. The height of the prism is 21 feet. Find the surface area of the triangular prism. 21 ft SA= 2B + Ph SA= 2(18) + 19(21) SA = SA= 435 ft²

Example  How much wrapping paper do you need to completely cover a rectangular box that is 20 inches by 18 inches by 6 inches? SA= 2B + Ph SA= 2(360) + 76(6) SA= SA= 1176 in² B = 20 x 18 = 360 in² P = = 76 in

Find the Surface area using the net 4 x 10 = 40 cm² 17 x 10 = 170 cm² 4 x 17= 68 cm² Add them up! SA = SA = 556cm²

Skills Check! When you finish turn your paper over and put it in the corner of your desk. No talking. Work on the Surface Area Worksheet.