Answer:
en anglais, s'il vous plait.
Step-by-step explanation:
m<1 + m<2 = 180°
m<3 + m<4 = 180°
Because they are both equal to 180°, you can set them equal to each other.
m<1 + m<2 = m<3 + m<4
Angles 1 and 4 are congruent (equal), so we can subtract them from each side to get:
m<2 = m<3
So for 9, to graph all you need to do is start at the origin (0,0) and go up 4 and over (right) 1.