tolong bantu di jawab dong..

6. x = √(20^2 - 12^2)
x = √(400-144)
x = √256 = 16 cm

7. a = √(13^2 - 5^2)
a = √(169-25)
a = √144 = 12 mm

x = √(12^2 + 35^2)
x = √(144 + 1225)
x= √1369 = 37