## An Elementary Geometry |

### From inside the book

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Page 8

... bounded by lines either straight or curved . When the bounding lines are straight , the figure is a polygon , and the sum of the bounding lines is the

... bounded by lines either straight or curved . When the bounding lines are straight , the figure is a polygon , and the sum of the bounding lines is the

**perimeter**. 20. An Equilateral Polygon is one whose sides are equal PLANE GEOMETRY . Page 22

... drawing a triangle upon the floor , walking over its

... drawing a triangle upon the floor , walking over its

**perimeter**, and turning at each vertex through an angle equal to the angle at that vertex . 76. Only one perpendicular can be drawn from a point 22 PLANE GEOMETRY . Exercises. Page 41

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**perimeters**of similar polygons are to each other as the homologous sides ; and the polygons as the squares of the homolo- gous sides . Let ABCDEF and GHIKLM be two similar polygons . 1st . Their**perimeters**are to each other as AB : GH ... Page 43

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**perimeters**of regular polygons of the same number of sides are as their apothems ; and the polygons as the squares of their apothems . THEOREM XVIII . 37. The area of a regular polygon is equal to half the product of its**perimeter**and ... Page 44

William Frothingham Bradbury. تو PRACTICAL QUESTIONS . 1. What is the

William Frothingham Bradbury. تو PRACTICAL QUESTIONS . 1. What is the

**perimeter**and the area of a rectangle 25 by 35 inches ? 2. What is the area of a parallelogram whose base is 20 feet and altitude 12 feet ? 3. What is the area of a ...### Other editions - View all

### Common terms and phrases

A B C A B D ABCD adjacent adjacent angles altitude angle ABC apothem base and altitude centre chord circ circumference cone construct the triangle convex surface Corollary cylinder diagonals diameter distance divided dodecagon equal altitudes equally distant equilateral feet frustum given angle given circle given line given point given side half the arc hexagon homologous sides hypothenuse included angle infinite number inscribed internal angles intersection isosceles triangle Let ABCDEF line joining lines A B measured by half mutually equiangular number of sides opposite sides parallelogram parallelopiped perimeter perpendicular plane parallel quadrilateral radii radius ratio rectangle regular polygon respectively equal rhombus right angles right prism right pyramid right triangle Scholium secant segment similar triangles slant height sphere tangent THEOREM VII trapezoid triangle ABC triangles are equal vertex