7. angle bad is congruent to angle eac a. given b. definition of congruence c. cpctc d. substitution property of congruence

C. CPCTC is your best answer

CPCTC means "Congruent Parts of Congruent Triangles are Congruent". Therefore, if the Triangles are congruent, then the parts of the triangles will also be congruent.

hope this helps

isaiah walks 3 miles due north, turns and then 5 miles due east. how far is he from his starting point?

a^2 + b^2 = c^2

let c = distance from starting point.

(3)^2 + (5)^2 = c^2

9 + 25 = c^2

34 = c^2

sqrt{34} = sqrt{c^2}

sqrt{34} = c