The triangle inequality

The answer is the first choice: 7, 15, 20.
When you want to know what three numbers can make up a triangle. All you have to do is take the first two numbers and add them up. If the sum is larger than the third number, it can form a triangle. If the sum of the first two numbers are smaller than the third number, it cannot form a triangle.
Hope this helped

hmmm this ones hardd, i shouldve payed attention in 1st grade instead of worrying  about what barney episode was playing :,)

Step-by-step explanation: happy holidayss