a boy is flying a kite attached to a 100 foot long string. If the string is tied to the ground at an angle of elevation of 40°, what is the height of the kite from the ground? 64 feet 77 feet 100 feet 84 feet

They are usually represented like this

commutative property of addition
a+b=b+a

associative property of additon
(a+b)+c=a+(b+c)

identity property of addition
a+0=a

so number sentatnces

lets say a=1,b=2,c=3

commutative property of addition
1+2=2+1

associative property of addition
(1+2)+3=1+(2+3)

identity property of addition
1+0=1