The order of the letters and figures in the following indicates the order of construction and of reasoning in discussing the figures.

Fig. 247. Direction of lines.

Fig. 248. Line construction.

Fig. 249. Angles.

Fig. 250. Divisions and constructions of angles.

1. Right (One right angle).

2. Equilateral (Equal sides).

3. Isosceles (Equal legs).

4. Scalene ( unequal legs and angles).

Fig. 251. Triangles.

1.Construct an equilateral triangle. One side given.

2. Find area ot a triangle.

3. The squares on the sides of a right triangle equal the square on its hypotenuse.

Fig. 252. Construction and area of triangles.

Fig. 253. Quadrilaterals.

1. Construct a parallelogram. Length of sides end an angle given.

2. Construct a square Length of side given.

Fig. 254. Construction and area of quadrilaterals.

Dimensions.

Parts.

Concentric (One centre).

Tangent (Touching).

Angle-85o.

Bisect an arc and its chord.

Fig. 256. Circles.

1. Draw a circle tangent to a given line at a given point.

2. Draw an arc or a circle tangent to a right angle.

3. Inscribed circle. Circumscribed square.

Fig. 256. Construction of circles.

1. Inscribe a hexagon.

2. Inscribe a pentagon.

3. Construct a pentagon.

4. Inscribe a dodecogon.

Fig. 257. Regular polygons.

Fig. 258. The octagon.

Fig. 250. Curves and spirals.

Fig. 260. Ellipse and oval.

Fig. 261. Solids.

Fig. 262. The cube.

Fig. 263. Board measure.