Answer:
 
Area of Square(leg 6): 36units 
 
Area of square(leg 8): 64units 
 
(3) 100units is the Area 
 
(4) Length of hypotenuse is 10units
Explanation:
Square(leg 6): 6*6= 36 
 
Square(leg 8): 8*8=64 
 
The bigger square: 64+36=100 
 
The length of the hypotenuse is 10units because 10*10=100
I hope this helps have a good day! :)