How can we cut a pie in 8parts but only in 3 moves?

Answer 1

I assume that you mean 3 cuts. The key thing is to have each cut affect each piece.
Start by cutting it in half. You now have two pieces.
Make a cut perpendicular to the first. You now have 4 pieces, each one is a 90 degree wedge of pie.
Now here's the tricky part. You want 8 parts, but it doesn't specify 8 wedge shaped parts. Now, cut in a circle about halfway from the center of the pie, all the way around. You will now have 4 inner pieces and 4 outer pieces, a total of 8.

Answer 2

First cut the pie into 4 quadrants with 2 perpendicular cuts.

Then stack the 4 pieces one on top of the other, and make 1 single bisecting cut.

You'll have 8 pieces of pie (maybe slightly squished, but) in just 3 cuts.

Answer 3

Easy. once you think about it.

a pie is has three dimensions so cut an X on top of the pie then cut the pie in half threw the middle (the edge) three cuts eight parts.

Think two layer cake, cutting the X on top of the cake will cut the cake into four parts, but if you take off the top layer you would have eight parts. (top and bottom)

Hoped it helped

Answer 4

Radius of pie = R
Area of pie = A = (pi) R^2
Cut by drawing a smaller circle of r, such that area of smaller circle = Half the area of the pie = A/2

(pi) r^2 = A/2 = (pi) (R^2) /2
r^2 = (R^2) /2
r = R/sqrt(2) = R / 1.414 = 0.7071 R

Don't move anything

Now make two cuts diametrically at right angles

You have 8 equal pieces of pie

Answer 5

Divide the pie into fourths regularly using two cuts...and then cut a circle around the middle.

A bigger challenge would be determining the radius of the circle to make each piece have equal area. :c)

Answer 6

Cut it into quarters with two cuts. With the third cut, slice it horizontally. This workes better with cake rather than pie.