Which statement is correct?
Joel’s proof: angle 2 + angle 3=180° (transversal t is a straight line)
angle 1 + angle 2 = 180° (PQ is a straight line segment)
Therefore, angle 1 + angle 2 = angle 2 + angle 3
Hence, angle 1 = angle 3

Melinda’s proof: angle 1 + angle 2 + angle 3 + angle 4 = 360°
Therefore, angle 1 + angle 4 = 180°
Hence, angle 4 = angle 2

Question

Which statement is correct?
Joel’s proof:   angle 2 + angle 3=180° (transversal t is a straight line)
angle 1 + angle 2 = 180° (PQ is a straight line segment)
Therefore, angle 1 + angle 2 = angle 2 + angle 3
Hence, angle 1 = angle 3   
 
Melinda’s proof:   angle 1 + angle 2 + angle 3 + angle 4 = 360°
Therefore, angle 1 + angle 4 = 180°
  Hence, angle 4 = angle 2

anonymous · Answer

attachment

anonymous · Answer

seems to be 1st proof (Joel's proof) is correct

can't get logic from Melinda's proof (maybe because she is a girl lol =)

shayaan_mustafa · Answer

I am sure it must be Joel's proof.

shayaan_mustafa · Answer

@Gepard 
lol..:p