Which set of numbers could be the lengths of the sides of a right triangle ? 2,6, and the square root of 40 . 4,6 and the square root of 40 2,18,20 4,36,40

answer is because 4×10=40

and 98×4= is 392

40,392

hi,

the area of abcd is 245.

3*24=230

4*94=1039

2*12=24

add all of them up, you get 2450

we need to divide the number of toy dinosaurs, 156, by the number of brothers, 4:

in order to estimate, we can use compatible numbers:

156 ÷ 4

  ↓

160   ÷ 4 = 40        

the correct answer is a).