Train up mathematics s1-s2 p56

👨🏻‍🏫 學術台數學

[匿名]

2010-08-28 11:47 pm

吾該...Train up mathematics s1-s2 p.56 第11題,
Find the total surface area and the volume of the prism.
(Note:The surface of the prism are 4 rectangles and 2 trapeziums.)

我解釋下幅圖, 個梯形:
上低:2
下低:4
高:√3

果長方形:
高:2
闊:5

5該曬!!

答案:surface area:50+6√3
volume:15√3

我想要式同過程...吾該....

更新1:

好想立即選你做最佳- -!!! thx!!!

回答 (1)

用戶2053

2010-08-29 12:02 am

✔ 最佳答案

The width of 2 middle rectangle = √{[(4-2)/2]^2 + (√3)^2} = 2
surface area :2 trapeziums + 4 rectangles = 2 x (2+4)√3 /2 + upper rectangle + lower rectangle + 2 middle rectangles= 6√3 + 2*5 + 4*5 + 2*5 + 2*5= 50 + 6√3volume :base area * height= trapezium area * 5= (2+4)√3 /2 * 5= 15√3

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