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FORM STUDY

Lines and Surfaces

A line drawn in the direction in which a body falls, if dropped, is called a

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vertical line.

1. Suspend your

pencil or some other

small object by a

string. The string

assumes a vertical

position.

2. Tie a weight

to a string and test several lines supposed to be vertical.

What line is being tested in the picture above?

A line perpendicular to a vertical line is called a horizontal line. The top of the blackboard in the picture represents a horizontal line.

3. Point out the horizontal lines in the picture.

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4. Point out various surfaces which appear to be level.

Carpenters use a spirit-level

to determine whether a surface is level.

5. If you can procure a spirit-level, test various surfaces.

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PARALLELS AND PARALLELOGRAMS

1. How does the distance between the vertical sides of a window-pane at the top compare with that at the bottom?

2. Do the two lines of rails of a railroad-track ever

meet? How does their distance apart at any place compare with that at any other place?

3. Point out other pairs of lines that are the same distance apart everywhere. This distance is always taken on lines perpendicular to the lines considered.

Two lines that are everywhere the same distance apart are said to be parallel.

4. Point out the pairs of parallel lines in Figure 1; in Figure 2.

Figure 1

Figure 2

Figure 3

A four-sided figure whose opposite sides are parallel is called a parallelogram.

5. What kind of a figure is Figure 2? Figure 3? How

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Figure 4

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many pairs of parallel lines are there in Figure 4?

6. Name several objects that are parallelograms. Is a rectangle a parallelogram? Are all parallelograms rectangles? Is a square a rectangle?

7. Draw a parallelogram in which the angles are not right angles, and whose adjacent sides are 2.5 in. and 63 in.

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1. Name 5 horizontal lines. 2. Name any level surfaces.

3. Name 5 vertical lines in the picture.

4. Name 5 sets of parallel lines in the picture.

5. Name any lines perpendicular to other lines.

6. Draw a horizontal line; a vertical line; two lines perpendicular to each other.

7. Place a pasteboard triangle so that one side rests on a straight line. Move the triangle from place to place along the line and draw parallels.

BUSINESS APPLICATIONS

Money-Orders

Money may be paid by means of postal money-orders, which are obtainable at post-offices, or by means of express moneyorders obtainable at the offices of the express companies.

The following order was purchased by F. P. Smith in New York City to pay L. C. Mason in Detroit, Mich., $1.25.

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FEES CHARGED FOR POSTAL MONEY-ORDERS

For payment in the United States (which includes Hawaii and Porto Rico), in Canada, in Cuba, and in the Philippines. For orders for sums not exceeding $2.50 3 cents

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The maximum amount for which a single money-order may be issued is $100. For a larger sum additional orders must be sent. The rates for express money-orders are practically the same.

Written.

MONEY-ORDERS

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1. What is the fee for a money-order for $1.75? For $2.50? For $2.55? For $4.20? For $6? For $18?

2. Carl sent for a camera which cost $15; a tennisracket, $3.75; and a rifle, $25. What was the fee for the money-order? The total cost?

3. A lady ordered a rug for $25, 20 yards of carpet at $1.32 a yard, and a couch cover for $8.75; what did she pay for all? What was the total cost of the money

order?

4. A musician ordered a mandolin for $8, a guitar for $7.50, a violin for $55.75, and a banjo for $12. What was the total cost of the money-order?

5. Mr. Mason bought of Ward and Company 1 box of soap at $4; 1 barrel of flour, $3.50; and 50 lb. of dried meat at 9¢ a pound. What was the cost of a money-order to pay for these goods?

6. Mrs. Martin bought of Thomas Smith 3 yd. of lace at $.65 a yard, 1 dozen handkerchiefs for $4.75, 4 yards of silk at $1.15 a yard, and a table-cloth for $8; what was the cost of the money-order to pay for these goods?

7. Mr. Carr bought of Milton Woodward & Co. a harness for $25, a saddle for $21.85, a horse-blanket for $3.75, and a set of sleigh-bells for $2.75; what did he pay for all ? What was the total cost of the money-order?

8. A publisher ordered a postal scale, price $2.40, and weight when packed 20 oz. He purchased a money-order to pay for the scale and postage at the rate of 14 an oz. How much did he pay the postmaster?

9. Make a list of articles and their prices from newspapers and magazines. Find the cost of money-orders to pay for such goods.

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