Question

Help me

Answer 1

1. Joel and Melinda provide the following proofs for vertical angles to be equal.


Joel's proof: angle 2 + angle 3=180° (t is a straight line)
angle 1 + angle 2 = 180° (PQ is a straight line)
Therefore, angle 1 + angle 2 = angle 2 + angle 3 (Transitive Property of Equality)
Hence, angle 1 = angle 3 (Subtraction Property of Equality)

Melinda's proof: angle 1 + angle 2 + angle 3 + angle 4 = 360°
Therefore, angle 1 + angle 4 = 180° (t is a straight line)
Hence, angle 4 = angle 2 (Transitive Property of Equality)
Which statement is correct? (4 points)


Only Joel's proof is correct.
Only Melinda's proof is correct.
Both Joel's and Melinda's proofs are correct.
Both Joel's and Melinda's proofs are incorrect.

Answer 2

@ganeshie8 @midhun.madhu1987 @perl

Answer 3

i think its c

Answer 4

????

Answer 5

Joel's proof looks good

Answer 6

yea

Answer 7

Melinda's proof looks broken at 3rd line as i don't see how she was able to use transitive property

Answer 8

ahh i guess i didnt catch that mistake

Answer 9

so are u saying that melindas proof is wrong?

Answer 10

yes

Answer 11

can you help me with one more?

Answer 12

Jazz draws a transversal, t, on two parallel lines AB and CD, as shown below.


He makes the following table to prove that the alternate interior angles are equal.

Statement Justification
angle 2 = angle 6 Corresponding angles of parallel lines are congruent.
angle 2 = angle 4 ?
angle 4 = angle 6 transitive property of equality,
angle 2 = angle 6,
angle 2 = angle 4,
therefore angle 4 = angle 6
Which is the missing justification? (5 points)


Angles 1 and 3 are supplementary; therefore, angle 2 is equal to angle 4.
Angles 1 and 3 are congruent; therefore, angle 2 is equal to angle 4.
Vertical angles are congruent.
Angles 1 and 4 and angles 1 and 2 are congruent; therefore, angle 2 is equal to angle 4.

Answer 13

im stuck on this as well

Answer 14

look at angles 2 and 4