The answer would be an angle.
That would be an "angle".
The size of the angle would depend on the shape and number of sides the polygon has. It is called the exterior angle.
Two obtuse angles.
Assuming the hour hand moves steadily for the entirety of the hour, the angle formed by the hour and minute hand would be 55 degrees.
At 12:30 the hour hand would be halfway between 12 and 1. So on the right hand side there would be an obtuse angle (165 degreees) whereas on the left there would be a reflex angle (195 degrees).
Right angles are formed by perpendicular lines. If the lines would extend, to make two intersecting lines, they would form four right angles. Perpendicular lines are written like this: . From its shape, you can already tell that it forms at least two right angles.
If you forgot to turn your clocks back you would be early for an appointment.
A right angle is always formed by two perpendicular lines. These lines would split a circle into quarters. There are 360 degrees in a circle, so one quarter would be 90 degrees. A right angle is always 90 degrees.