Alternate interior angles are congruent. So, angle 3 = angle 7.
We see that vertical angles are congruent. So, angle 3 also = angle 5.
Alternate exterior angles are congruent.
So, angle 3 also = angle 1.
If the base is square, and the perimeter is 14.5, that means that each side of the base is 14.5/4=3.625. Since we now know the length and the width, as well as the height which is 16.8, we plug into the formula
. So, plug in the details
Your answer will be 73.6 cm^3
The awnser is 145
(50 divided 2) = 25
5 to the power of 3= 125
-5
=145
I think its the third one