Henagon has 1 angle.
Semi-circle has 2 angles.
Triangle has 3 angles.
Square has 4 angles.
Pentagon has 5 angles.
Hexagon has 6 angles.
Heptagon has 7 angles.
Octagon has 8 angles.
Nonagon has 9 angles.
Decagon has 10 angles.
Henagon has 1 angle.
Semi-circle has 2 angles.
Triangle has 3 angles.
Square has 4 angles.
Pentagon has 5 angles.
Hexagon has 6 angles.
Heptagon has 7 angles.
Octagon has 8 angles.
Nonagon has 9 angles.
Decagon has 10 angles.