Points a, b, and c form a triangle. complete the statements to prove that the sum of the interior angles of δabc is 180°.

because a triangle is half of a square even iif it is not a right triangle than the angles have to add up to 180 degrees. because a square is 360 degrees. if the angles are more or less than 180 degrees combines the points witll not touch eachother therfore it will just be a line and not a shape of a triangle.

(not sure if this is what you were looking for but i hope it and if not that i am sorry.)

∠3 ≅ ∠5 and ∠1 ≅ ∠4: alternative angles theorem

m∠1 = m∠4 and m∠3 = m∠5: congruent angles have equal measures.

answer: 1.06 km per sec

step-by-step explanation:

39.6 m=63.72 km

60 min in an hour so 63.72/60=1.06