PQ+QR=PR what property is this the definition of

Segment Addition Postulate

This is the idea where we can take any line segment and break it into smaller pieces, then glue those pieces back together to get the original line segment.

The original line segment is PR. Point Q is somewhere between the endpoints. The smaller pieces are PQ and QR. Adding PQ with QR forms PR again. In the real world, you can do this with a stick or string, though this assumes there are no wasted bits that are thrown away or lost.

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 !