# Explanatory mensuration for the use of schools

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### Contenido

 THE REGULAR POLYGON 44 THE IRREGULAR POLYGON 47 OFFSETS 51 THE CIRCLE THE CIRCUMFERENCE AND DIAMETER 54 THE AREA OF A CIRCLE 57 THE CHORDS OF A CIRCLE 65 THE ARC OF A CIRCLE 70 THE SECTOR OF A CIRCLE 75
 THE PRISMOID 124 THE SPHERE 128 THE SEGMENT OF A SPHERE 135 THE ZONE OF A SPHERE 138 THE CIRCULAR RING 140 IRREGULAR SOLIDS 143 ANSWERS 147

### Pasajes populares

Página 23 - RULE. — From half the sum of the three sides, subtract each side separately; multiply the half -sum and the three remainders together; the square root of the product is the area.
Página 118 - A sphere is a solid bounded by a curved surface, every point of which is equally distant from a point within called the center.
Página 63 - Or, from 8 times the chord of half the arc, subtract the chord of the whole arc, and \$ of the remainder will be the length of the arc, nearly.
Página 33 - Multiply the sum of the parallel sides by the perpendicular distance between them, and half the product will be the area.
Página 19 - A rectangle is a four-sided figure like a square, in which the sides are perpendicular to each other, but the adjacent sides are not equal. 280. A parallelogram is a foursided figure which has its opposite sides equal and parallel, but its angles not right angles. The line DE, perpendicular to the base, is called the altitude.
Página 149 - Such a work will be of value to a candidate as a test of his ability to work the Arithmetical problems he is likely to have given him to solve in his examination ; but when it is used simply as a means of cramming the pupil, it becomes pernicious. We notice Mr. Hiley has carefully arranged...