Inventional Geometry: A Series of Problems : Intended to Familiarize the Pupil with Geometrical Conceptions, and to Exercise His Inventive FacultyAmerican Book Company, 1876 - 97 páginas |
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Página 35
... sector with a reëntrant angle . 86. Of how few lines can you make a figure with a reëntrant angle ? 87. Of how few sides can you make a figure with two reëntrant angles ? 88. Of how few sides can you construct a tigure with three ...
... sector with a reëntrant angle . 86. Of how few lines can you make a figure with a reëntrant angle ? 87. Of how few sides can you make a figure with two reëntrant angles ? 88. Of how few sides can you construct a tigure with three ...
Página 36
... sectors ? A sector that contains a sixth part of a cir cle is called a sextant . 91. Make a sextant , and write upon it its name . 92. Construct an equilateral triangle , and write in each angle the number of degrees it contains . 93 ...
... sectors ? A sector that contains a sixth part of a cir cle is called a sextant . 91. Make a sextant , and write upon it its name . 92. Construct an equilateral triangle , and write in each angle the number of degrees it contains . 93 ...
Página 38
... sectors ? 109. Can you fit an equilateral triangle in a circle ? 110. Draw two lines cutting each other , and show what is meant when it is said that those angles which are vertically opposite are equal to one another . 111. Can you ...
... sectors ? 109. Can you fit an equilateral triangle in a circle ? 110. Draw two lines cutting each other , and show what is meant when it is said that those angles which are vertically opposite are equal to one another . 111. Can you ...
Página 41
... sectors ? 125. Can you place two octagons so that one side of one octagon may coincide with one side of the other ? You have divided a sector into two equal sectors , and an angle into two equal angles . 126. Can you divide a sector ...
... sectors ? 125. Can you place two octagons so that one side of one octagon may coincide with one side of the other ? You have divided a sector into two equal sectors , and an angle into two equal angles . 126. Can you divide a sector ...
Página 79
... sector whose radial boundaries are each 20 yards , and whose arc contains 35 ° ? 356. The largest pyramid in the world stands upon a square base , whose side is 700 feet long . The pyramid has four equilateral triangles for its surfaces ...
... sector whose radial boundaries are each 20 yards , and whose arc contains 35 ° ? 356. The largest pyramid in the world stands upon a square base , whose side is 700 feet long . The pyramid has four equilateral triangles for its surfaces ...
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Términos y frases comunes
adjacent angles AMERICAN BOOK COMPANY angular points arc is called arithmetic arithmetic mean arrange the surfaces BALFOUR STEWART Barnes's Brief History base boundaries breadth card a hollow cents circumference Cloth construct cube curve diameter dimensions divide a circle divide a line divide an equilateral dodecagon duodecimals EDWARD EGGLESTON ellipse equal and similar equal sectors equilateral triangle find the area four equal FRANKLIN TAYLOR geometry Give a plan give a sketch gles HERBERT SPENCER hexahedron icosahedron illustrated Inventional Geometry isosceles triangle length line drawn line of chords line of sines line of tangents nonagon number of degrees octagon octahedron pentagon perpendicular piece of card place a circle place a hexagon place a square polygon protractor pupil pyramid quadrant quadrilaterals radii radius ratio rectangle reëntrant angle rhomboid rhombus right angle right-angled triangle secant sides is called solid square inches takes the name tetrahedron Thalheimer's touch trapezium versed sine write its name zoid
Pasajes populares
Página 41 - TRIANGLES upon the same base, and between the same parallels, are equal to one another.
Página 21 - All arcs of circles that are not so great as a semi-circumference are called less arcs. A line that joins the extremities of an arc is called the chord of that arc. When two radii connect together any two points in the circumference of a circle which are on exactly the opposite sides of the centre, they make a chord, which is called the diameter of the circle, and such diameter divides the circle into two equal segments, 1 which take the name of semicircles.