Points a, b, and
form a triangle. complete the statements to prove that the sum of the interior angles of aabc is 180°.
statement
reason
points a, b, and form a triangle.
given
let de be a line passing through band parallel to ac. definition of parallel lines
23 25 and 21 % 24
mz1 = m 24 and 23 = m25
m24+ m 22+ m25 = 180°
angle addition and definition of a straight line
m21 +22+ m23 = 180°
substitution
reset
next
edmentum. all rights reserved.
sign out