Try it
Logo Playground
One of the easiest things to do in Logo is use the turtle to draw various polygons. You can notice that in order to draw a closed polygon, the turtle has to walk around the edges, eventually turning through 360 degrees before coming back home. Since the turtle makes N turns for an N-sided polygon, the size of each turn is 360/N degrees.
Triangle (3 sides)
Turtle turns 120°
Square (4 sides)
Turtle turns 90°
Pentagon (5 sides)
Turtle turns 72°
Hexagon (6 sides)
Turtle turns 60°
Septagon (7 sides)
Turtle turns 51°
Octagon (8 sides)
Turtle turns 45°
REPEAT 3 [FD 100 RT 120]
REPEAT 4 [FD 100 RT 90]
REPEAT 5 [FD 100 RT 72]
REPEAT 6 [FD 100 RT 60]
REPEAT 7 [FD 100 RT 51]
REPEAT 8 [FD 100 RT 45]