Any give brainlest,,answer choices is applied here. need explanation also on your answers

What can be said about the relationship between triangles and circles? check all that apply. a) many circles can be inscribed in a given triangle b) exactly one triangle can be inscribed in a given circle c) exactly one circle can be inscribed in a given triangle d) many triangular shapes can be circumscribed about a given circle

Acylinder has volume 45π and radius 3. what is it’s height?

In a column proof the right column states your reasons