复习正方形，三角形，学习长方形，梯形，椭圆形，知道他们的特征。

Repeat basic shapes like square, triangle, circle and know their characteristics.

youdao

复习正方形，三角形，学习长方形，梯形，椭圆形，知道他们的特征。

Repeat basic shapes like square, triangle, circle and know their characteristics.

youdao