Question

help friends English ​

Answer 1

Answer:

1.4 sides

2. 2 sides

3. 360 degree

4.edge

5.180 degree

6.x

7.✓

8.x

9.✓

10.✓

Answer 2

Answer:

1. four

2. two

3. 360

4. diagonal

5. 180

6. False

7. True

8. False

9. True

10. False

Explanation:

A quadrilateral is a polygon with four sides. Its angle sum is equal to 360 degrees. It has two diagonals.

If A + B + C + D = 360

Then, given that A + B = 180

Thus,

180 + C + D = 360

C + D = 360 - 180

C + D = 180

No other explanation is needed.