The plane is horizontal, what describes the shape of the cross section?

a. rectangle
b. trapezoid
c. triangle
d. pentagon

Triangle

Step-by-step explanation:

A square pyramid has 4 sides that are triangles and a square base.

A plane that contains the vertex (top of the pyramid) and is perfectly vertical, must contain the vertex, the lines formed by the intersection of the plane with the left and right triangles, and the line formed by the intersection of the plane with the square. So the figure must be a triangle.

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.

it's a proportional graph.

step-by-step explanation:

8 x 5 = 40         (and you have -8x and -5y)

x= absiss

y= orderly

so you have a proportional graph.