Page:An introduction to linear drawing.djvu/67

 ﻿SECOND CLASS.

1.	How will you proceed in making two angles of perpendicular sides ? (page 10.)

2.	What sort of angles will thus be formed ? Ans. One acute and one obtuse.

3.	When you make two triangles of perpendicular sides, how must each side of each triangle be ?

4.	How many sides has a trapezoid ?

5.	Which two sides of a trapezoid are called the bases ?

6.	What is the height of a trapezoid ?

7.	In what does a trapezoid differ from a trape- zium ?

8.	What is the meaning of the word polygon ?

9.	What is the best method of making a polygon ?

10.	When is a polygon said to be regular ?

11.	After you have drawn a polygon, how must you proceed to draw diagonals ?

12.	When you wish to draw a parallel polygon out- side of another, what must you do first ? Ans. Length- en the diagonals.

13.	What is a triangular pyramid ? Ans. One whose base is a triangle.

14.	How do you proceed to draw a triangular pyra- mid ?

15.	What is the height of a pyramid ?

16.	In drawing a pyramid, must the front or back lines of the base be uppermost ?

. 17. What is a quadrangular pyramid ?

18.	When a pyramid is to be cut by a plane, what part must be drawn last ?

19.	What is the height of a pyramid?

20.	In drawing a pyramid, which lines are longest the front or back oblique lines ?

21.	When the base of a pyramid is a regular poly- gon, how may you know if the pyramid be upright and regulp" s