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12 inches accuracy accurately acute Appendix architectural attention base black board Book building called centre chalk circle circumference considered consists contains Copy Exercise correct course cultivation curve DEFINITIONS diagonal diameter directions Divide door Draw drawn elementary ellipse Enclose entirely equal EUCLID Example Explain extremities feet figure fillet find the area five formed four given greater half height horizontal line Illustrate on black includes introduction kinds knowledge length LESSON lineal drawing materials mechanical MENSURATION mind minutes models moulding Multiply names objects oblique line opposite outline ovolo panels parallel parallelogram pencil perpendicular placed Point polygon portion practical present principal Prob Prop proportion pupils purlines rails rectangle Repeat required area respectively result right angle right lines roof Rule schools sides solid contents square succeeding success supply teacher termed triangle Tuscan column various
Side 40 - To find the solidity of a cone. RULE. Multiply the area of the base by the perpendicular height, and ^ of the product will be the solidity.
Side 15 - A Segment is any part of a circle bounded by an arc and its chord. 51. A Semicircle is half the circle, or a segment cut off by a diameter. The half circumference is sometimes called the Semicircle. 52. A...
Side 9 - Hexagon, of six sides; a Heptagon, seven; an Octagon, eight; a Nonagon, nine ; a Decagon, ten ; an Undecagon, eleven ; and a Dodecagon, twelve sides.
Side 35 - Triangles on the same base, and between the same parallels, are equal.
Side 35 - Any two angles of a triangle are together less than two right angles.
Side 37 - To find the area of a trapezium. RULE. — Divide the trapezium into two triangles by a diagonal, and then find the areas of these triangles ; their sum will be the area of the trapezium.
Side 14 - ... foursided figure with all its sides equal, and all its angles right angles.
Side 38 - Ibs. 7 oz. to ounces. 2. The proportion of the diameter of a circle to its circumference is very nearly 113 to 355; find the circumference of a circle whose diameter is 1 32 feet.
Side 36 - I 8.78 .|- yards breadth of the walk. PROBLEM II. To find the area of a rhombus or rhomboid. RULE. — Multiply the length of the base by the perpendicular height. 6. The base of a rhombus being 12 feet, and its height 8 feet. Required the area. Ans. 96 feet. PROBLEM III.