if quadrilateral abcd is a parallelogram, then which of the following statements must be true?

a.

< a = < d

b.

< a + < c = 180°

c.

< b + < c = 90°

d.

< a + < d = 180°

the statement must be true

D. <A+<D=180°

351.23

step-by-step explanation:

answer: the answer is (b) amie should have multiplied

step-by-step explanation: given a sphere and a cylinder with same radius and height.

let, 'r' be the radius of the cylinder and sphere and 'h' be the height of the cylinder. according to the question,

r = h.

now, the volume of the sphere will be

and the volume of the cylinder will be

therefore, we have

thus, ammie should have multiplied the volume of the sphere