题干

如图所示的是某个几何体的三视图.

(1)说出这个立体图形的名称;

(2)根据图中的有关数据,求这个几何体的表面积.

上一题 下一题 0.0难度 选择题 更新时间:2019-12-11 06:41:41

答案(点此获取答案解析)

解:(1)这个立体图形是直三棱柱;
(2)表面积为:
1
2
​×3×4×2+15×3+15×4+15×5=192.

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    Last week Lu visited England. He stayed with my grandmother. He said it was a strange visit. “I don't understand, but I1your grandmother a lot. When I arrived, I gave her a 2from Suzhou. She looked in it and asked me to take it back. Then I saw a red spider(蜘蛛) on the table so I killed it for her and she seemed very 3. Do English people like spiders?”
    “Later we went shopping. Someone was painting a shop 4, so there was a ladder. Grandmother5me walking under it and said I must walk around it. I liked the shops and bought a smart 6for my father and some new shoes for myself. When we got back, I put the shoes on the table and opened the umbrella to wonder 7it was all right. Your grandmother came in and 8!”
    “Then I broke a small 9 in the bathroom. Your grandmother’s face went white. I felt very sorry. When I left I gave 10grandmother some flowers. She counted and there were 13. She 11it. I think she was happy I was going.”
    I 12to Lu, “My grandmother follows the old customs(习俗). You must not give someone an empty purse 13they will have no money. You must not kill a “money spider”or the same will happen. It is very unlucky to walk under a ladder and to put new shoes on the table. A(n)14umbrella in a house means someone will die. Breaking a mirror brings seven years’ bad luck, and 13 is 15a very unlucky number. You were really making my grandmother very afraid. ”