# $\Theta =70$ degrees into seven angles $\Theta /7=10$ is not possible by euclids method

Why we can not divide $\Theta =70$ degrees into seven angles $\Theta /7=10$ degrees using euclids tools. How I apply chebyshev polynomial to solve it.

Does any one can help, I am not sure how to solve this.

• Multiply $70^\circ$ by $5$, and you get $-10^\circ$ – Michael Jun 26 '18 at 7:30
• The way it's stated, if you're given a 70 degree angle shouldn't you just be able to subtract 60 degrees to get the 10 degree angle? – Daniel Schepler Jun 26 '18 at 7:32