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maths Qs F6 3條 20分 (2)

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1.A football is formed by 20 hexagons and 12 pentagons It has 32 faces, 60 vertices and 90 sides. How many diagonals does a football have?A:406B:496C:1680D:1770ans:C2.In the figure, ABCD is a parallelogram, BM=MC and CN=2ND. If the area of the parallelogram is 60, find the area of triangle... 顯示更多 1.A football is formed by 20 hexagons and 12 pentagons It has 32 faces, 60 vertices and 90 sides. How many diagonals does a football have? A:406 B:496 C:1680 D:1770 ans:C 2.In the figure, ABCD is a parallelogram, BM=MC and CN=2ND. If the area of the parallelogram is 60, find the area of triangle AMN. figure: https://www.flickr.com/photos/maggie_bye3/14940514711/ A:5 B:20 C:25 D:30 ans:C 3.A cube is inscribed in a sphere of radius r. The side of the cube is choices: https://www.flickr.com/photos/maggie_bye3/14756958830/ ans:D thanks!!!!!!!!!!!!!!!!!!!! :)

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Please read: 圖片參考：https://s.yimg.com/rk/HA00430218/o/271660072.png

 

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