第七单元

Unit seven

ACT OF LOVE爱心行动

Graphics and groupings图形与拼组

Lesson one

1. How do you make a rectangular sign?

怎样做一个长方形的牌子呢？

2. What are the features of a rectangle？

长方形有哪些特点呢？

3. The opposite sides of a rectangle are equal; all four angles are right angles.

长方形的对边相等，四个角都是直角。

4. The length of the long side of a rectangle is usually called long and the length of the short side called wide.

通常把长方形长边的长叫作长，短边的长叫作宽。

5. How do you make a square sign？

怎样做一个正方形的牌子呢？

6. Let's study the characteristics of the square first.

我们先研究一下正方形的特点。

7. All four sides of a square are equal and all four angles are right angles.

正方形的四条边都相等，四个角都是直角。

8. The length of each side of a square is called the length of the side.

正方形的每条边的长，叫作边长。

9. Looking at the picture, what shape is it?

观图，是什么形状的呢？

Lesson two

1．How do you make this figure？

怎样拼成这样的图形？

2. What figures are made up of this picture？

这幅图是由哪些图形拼成的？

3. Birds are made of triangles, parallelograms and circles.

小鸟是由三角形、平行四边形和圆拼成的。

4. The gravel road is made of pentagons and hexagons.

石子路是由五边形和六边形拼成的。

5. What else do you want to spell?

你还想拼什么图案？

6. Come and have a try!

快来试一试吧！