Pls whoever answers this question will get brainliest and !

1.  x=40

2.sometimes

Step-by-step explanation:

1.  <x and 40 are equal because they are vertical angles and vertical angles are equal.

2.   Adjacent angles are sometimes congruent.  Angles next to each other can be equal to each other, but they do not have to be.

2 ninety degree angles making a straight line are congruent.

A 50 and a 130 making a straight line are not congruent.

80π/3 or about 83.775

step-by-step explanation:

since a cone is 1/3 of a cylinder, we need to find the base's area. since area = πr^2, we get 16π. then, multiplying this by 5, we get 80π. dividing by 3, since the cone's volume is 1/3 of that of a cylinder's, we get 80π/3.

hope this !