Chứng minh mệnh đề sau bằng phương pháp phản chứng:
1 answer:
You might be interested in
Terri can swim 3 laps in 2.5 minutes. To find how long it takes to swim 20 laps, you can make a proportion.
Put the amount of laps on the top and the time(minutes) at the bottom.
Cross multiply:
Divide by 3:
It would take Terri OR
minutes to run 20 laps.
Answer:
---
---
-
Step-by-step explanation:
Given
--- perimeter
Required
Possible dimension of different parallelogram
The perimeter is calculated as:
So,we have:
Divide by 2
Since l and w must be positive integers, the possible dimensions are:
---
---
-