Respuesta :
When you multiple a whole number times itself the resulting product is called a square number or a perfect square or simply a square so 1,4,9,16,25,36,49,64,81,100.121,144 and so are all square number
Answer:
Because 5 times 5 is 25.
Step-by-step explanation:
5 x 5 =25
When a whole number goes into itself, it is a perfect square.
Hope this helps!