Cho tam giác ABC có AB=AC. gọi là E trung điểm BC a) chứng minh AE là phân giác góc A
b) chứng minh AE vuông góc với BC
c) vẽ EQ vuông góc với AB tại Q
vẽ EK vuông góc với AC tại K
d) chứng minh BQ=CK
e) chứng minh AQ=AK
f) chứng minh AE vuông góc QK
g) chứng minh QK// BC

60 for the first and 130 for the second

step-by-step explanation:

statement #3: proof- ang is congruent to ang ecd : angles are congruent.  

step-by-step explanation:

1: the missing angles in statement #3  

a.) acb  

reason- the reason why the answer is acb is because angle ecd and angle acb are both the same size *that's what the word congruent means this is really simple.  

2: the missing word in reason #3  

c.) vertical  

reason- the reason why the answer is vertical is because the angles in that diagram on figure 2 is slanted, which is vertical, and the e and a both lay on vertical lines. along with the other's, but e and a are the 2 main points you want to focus on. and c is kind of like your starting point, because c is for both angles, not just one.  

i hope that was and understanding.

hi there, i would be interested to you with your test, may you add the questions and answer options.

- : )