Which math sentence can be used to determine if this triangle is a right triangle?

A triangle has side lengths 21, 20, and hypotenuse 29.
20 + 21 = 29
20 squared + 21 squared = 29 squared
29 + 21 = 20
29 squared + 21 squared = 20 squared

square on longest side

=

29

2

=

841

sum of squares on other 2 sides

=

20

2

+

21

2

=

841

This means that the triangle is right , with hypotenuse of 29.

Step-by-step explanation:

b

Step-by-step explanation:

i took the quiz on edge

answer: first option i.e. 'a' is correct.

step-by-step explanation:

since we have given that

number of minutes to wrap a small gift box = 4 minutes

we need to find the number of gifts to be wrapped in 5 minutes

since there is a direct variation, as the number of minutes will increase with   number of gifts to be wrapped.

so, let the number of gifts to be wrapped in 5 minutes be x.

so, it becomes,

hence, first option 'a'   is correct.