Answer:
Step-by-step explanation:
it's 2ab + c^ 2
why?, well, we can change the position of the 2 triangle in each corners into this (in the picture below) :
you can see that a^2 + b^2 = c^2
then there are 2 ab from 4 triangles we add that create 2 rectangle then we multiply each rectangles by its sides
so , c^ 2+ 2ab is the answer
I
hope this is helpul!
State the vertex and axis of symmetry of the graph of y=ax^2+c
General form of quadratic equation is 
There is no bx in our given equation, so we put 0x
Given equation can be written as 
a=a , b=0
Now we use formula to find vertex


Now we plug in 0 for 'a' and find out y

So our vertex is (0,c)
The axis of symmetry at x coordinate of vertex
So x=0 is our axis of symmetry
Triangular prism. It has three sides so a triangle