วันพฤหัสบดีที่ 21 กุมภาพันธ์ พ.ศ. 2556


Surface area of polygon


Surface area of polygon
example
regular polygon = (1/2) n sin(360°/n) S2
when n = # of sides and S = length from center to a corner

Find the surface area of a rectangular prism with length=0.2 m, width=40cm and height=0.8m.

1.     find the surface area of this picture and show the formula





















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2.    find the surface area of this picture and show the formula

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3.   find the surface area of this picture and show the formula



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4.    find the surface area of this picture and show the formula


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5.    find the surface area of this picture and show the formula


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6. Find the surface area of a rectangular prism with length=0.2 m, width=40cm and height=0.8m. <surface area=LWH>
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  7. Find the surface area of cone with radius=12cm. and slat height=20cm. <surface area=pi (R S) + pi (Rpower2)>
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8. Find the surface area of sphere with radius=2.5 inches
<Surface area=4(pi) x (Rpower2)>
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9. Find the surface area of hemisphere with diameter=32cm.
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10.Find Surface Area of Square Pyramid with a square base = 12m; Height of slant faces = 7 m

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