1. Given Triangle MNP, Anna is proving m angle 1 + m angle 2 = m angle 4.
Which statement should be part of her proof?

(Look at the first picture below) : )

2. YQ and XP are altitudes to the congruent sides of isosceles triangle WXY.

Keisha is going to prove YQ is congruent to XP by showing they are congruent parts of the congruent triangles triangle QXY and triangle PYX. By what congruence postulate is triangle QXY is congruent to PYX?

(Files in the second comment) : )

Question

1. Given Triangle MNP, Anna is proving m angle 1 + m angle 2 = m angle 4.
Which statement should be part of her proof?

(Look at the first picture below) : )

2. YQ and XP are altitudes to the congruent sides of isosceles triangle WXY.

Keisha is going to prove YQ is congruent to XP by showing they are congruent parts of the congruent triangles triangle QXY and triangle PYX. By what congruence postulate is triangle QXY is congruent to PYX?

(Files in the second comment) : )

anonymous · Answer

Triangle MNP

anonymous · Answer

Files for question 2!

terenzreignz · Answer

Hmm... what's the sum of the measures of angle 3 and 4?
(They form a linear pair, so...?)

mayankdevnani · Answer

@terenzreignz   is right. they form a linear pair and linear pair sums always 180 degree.

terenzreignz · Answer

mhmm :)
now what about the sum of all the angles 1,2, and 3? :D

mayankdevnani · Answer

take an example:-
|dw:1373625323963:dw|
what is the value of angle DCA?