部编版三年级下册数学电子课本

2024年4月16日发(作者：如皋2.5模数学试卷2023)

部编版三年级下册数学电子课本

1. Look at the picture.

2. What shape is it?

3. It is a triangle.

4. How many sides does it have?

5. It has three sides.

6. What are the three sides called?

7. They are called the three sides of a triangle.

8. What are the three angles called?

9. They are called the three angles of a triangle.

10. What is the sum of the three angles of a triangle?

11. The sum of the three angles of a triangle is 180 degrees.

12. What is the name of the triangle with two equal sides?

13. It is called an isosceles triangle.

14. What is the name of the triangle with three equal sides?

15. It is called an equilateral triangle.

16. What is the name of the triangle with two equal angles?

17. It is called an isosceles triangle.

18. What is the name of the triangle with three equal angles?

19. It is called an equiangular triangle.

20. What is the name of the triangle with one right angle?

21. It is called a right triangle.