Marks' first lessons in geometry / In two parts. Objectively presented, and designed for the use of primary classes in grammar schools, academies, etc.

by Bernhard Marks

The angle a o b has its vertex at what part of the larger circle?

At what part of the smaller circle?

On how many degrees of the larger circle does the angle stand?

On how many degrees of the smaller circle does it stand?

Then it is said to be an angle of 90°.

If the angle a o f is an angle of 30°, how many degrees must there be in the arc a f?

If the arc f e is an arc of 60°, what is the size of the angle f o e?

An angle of 10° stands upon an arc of how many degrees? Of 8°? Of 1°?

The angle a o b is what kind of an angle?

Upon how many degrees does it stand?