Do congruent regular dodecagons (12-sided polygons) tessellate a plane?

No because  a regular polygon is a two-dimensional shape with straight sides that all have equal length. A regular decagon is a 10-sided regular polygon. As it turns out, there are only three regular polygons that can be used to tessellate the plane: regular triangles, regular quadrilaterals, and regular hexagons.

answer: a.

step-by-step explanation: the answer is a. because, you need to converge the fractions to find a solution.

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