What's the minimum number of straight cuts required to cut a pizza into 7 pieces of equal area?

Question

Without taking the pizza out of the box or moving any part of it, what's the minimum number of straight cuts required to cut it into 7 pieces of equal area? A straight cut may start and end anywhere, and the pizza comes uncut and round in the box.

Answer 1

Answer: 4 cuts
A vertical line to cut 1/7 of the pizza (on the left). Another vertical line to cut 2/7 of the pizza (on the right).

A vertical cut to divide the center piece in half.

At last a horizontal line passing thru the center of the pizza to divide in half the three pieces on the right.

here is the image.

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