PentagramOne of my 9th grade students brought me this problem last week. The teacher asked them to estimate the five angles of a star. I thought it was a nice problem so I worked out a proof for it. This is what I'd like to share below. #proof #math

One of my 9th grade students brought me this problem last week. The teacher asked them to estimate the five angles of a star. I thought it was a nice problem so I worked out a proof for it. This is what I'd like to share below. #proof #math