Page:An introduction to linear drawing.djvu/69

 ﻿15. When a tangent is drawn from a given point, how many points of a circle can it touch ?

16.	What is the proportion between the radius of a Circle and one side of a hexagon inscribed in it ?

17.	What is meant by unequal circles ? (p. 20.)

18.	What is meant by a regular Polygon ? (p. 21.)

19.	What is a regular hexagon ?

20.	What is a regular pentagon ?

21.	What is a regular octagon?

22.	How will you circumscribe a triangle with a circle ?

23.	How will you find the Centre of a circle to be in- scribed in a triangle ?

24.	Where is the centre of an Arc which passes through two given points ?

25.	When you wish to draw several arcs through two given points, as in drawing the meridians on a map of the globe, how do you proceed ?

26.	When the base and other sides of a triangle are given, how will you find the point where the other two sides will touch ?

27.	If the sides cannot touch, how is the problem said to be ?

FOURTH CLASS.

1.	In drawing a right line, tangent to two circles, how must the two circles be placed t (p. 25.)

2.	When are two circles said to intersect each other ?

3.	How many tangents may be drawn to two circles ?

4.	How many will be interior, and how many ex- terior ?

5.	Where will the interior tangents cross each other ?