题目内容
When aline turns a corner three times, it makes a triangle. Triangleshave three sides and three corners.You can use triangles to make a face on a 7 .
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When a line turns a corner four times, it makes a square.A square has four sides and four corners. Each side is the same 8 .
You can use squares and half–circles to make a truck.A rectangle has four sides, just like a 9 . Two sides are the same length.The other two sides are another length. You can use rectangles, circles, squares and lines to draw a bus.
On another piece of paper, draw a rectangle.Then make it a house with a 10, two windows, and a door. Use a triangle and three rectangles.
校园网的拓扑一般是什么结构？
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