Mensuration for elementary and middle class schools1875 - 85 páginas |
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Página 14
... diameters of a circle cross each other at right angles , as in the figure , they make four angles of 90 degrees . Every angle which con- tains 90 ° is a right angle ; half of a right angle ( BOF ) is an angle of 45 ° , and a third of ...
... diameters of a circle cross each other at right angles , as in the figure , they make four angles of 90 degrees . Every angle which con- tains 90 ° is a right angle ; half of a right angle ( BOF ) is an angle of 45 ° , and a third of ...
Página 29
... diameter , and is exactly equal to twice the radius . The diameter divides the circle into two semicircles . The rule for finding the area of a circle may be stated in various ways , all of which , however , are but different ways of ...
... diameter , and is exactly equal to twice the radius . The diameter divides the circle into two semicircles . The rule for finding the area of a circle may be stated in various ways , all of which , however , are but different ways of ...
Página 30
... diameter of the circle of the perimeter of the circumscribed and inscribed polygons , beginning with a polygon of 4 sides , and proceed- ing by doubling the number of sides up to 8192 . The above table is valuable , because it enables ...
... diameter of the circle of the perimeter of the circumscribed and inscribed polygons , beginning with a polygon of 4 sides , and proceed- ing by doubling the number of sides up to 8192 . The above table is valuable , because it enables ...
Página 31
... diameter by 7854 ; or , 2. Multiply the square of the radius by 3.14159 . While dealing with the subject of the circle , it will be as well to discuss the method for find- ing the area of a ring , i.e. , of the space included between ...
... diameter by 7854 ; or , 2. Multiply the square of the radius by 3.14159 . While dealing with the subject of the circle , it will be as well to discuss the method for find- ing the area of a ring , i.e. , of the space included between ...
Página 32
... diameters are respectively 1. 28 yds . 2. 120 ft . 3. 24.25 ft . 4. 7912 miles . 5. 3 ft . 9 in . 6. 883220 miles . 7. 7680 miles . 8. 7958 miles . 9. 483 ft . 10. 126 ft . Find the diameter of each of the following circles whose circum ...
... diameters are respectively 1. 28 yds . 2. 120 ft . 3. 24.25 ft . 4. 7912 miles . 5. 3 ft . 9 in . 6. 883220 miles . 7. 7680 miles . 8. 7958 miles . 9. 483 ft . 10. 126 ft . Find the diameter of each of the following circles whose circum ...
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Términos y frases comunes
16 Maps acres ATLAS base breadth calculating called centre chains circle circular circumference cloth lettered consisting of 32 contains exactly convex surface cube cubic foot cubic ft diagonal diameter dimensions divided ellipse Euclid EXERCISES Fcap feet field find its area find its solidity find its volume find the area find the cost find the length Find the solid find the volume frustrum GEOGRAPHY Glasgow Gunter's chain heptagon Herriot Hill hypothenuse inscribed LESSON LL.D miles multiply half number of sides ordinates parallel parallelopiped pentagonal perpendicular distance perpendicular height Physical Map pickets poles radius rectangular regular polygon rhomboid rhombus right angle right-angled triangle rule sector segment side measures slant height small faces solid content solid figure sphere is equal square and rectangle square foot square pyramid square yard straight line surveyor trapezium trapezoid triangular prism vertex wedge World-shewing
Pasajes populares
Página 10 - When a straight line standing on another straight line makes the adjacent angles equal to one another, each of the angles is called a right angle ; and the straight line which stands on the other is called a perpendicular to it.
Página 29 - A circle is a plane figure contained by one line, which is called the circumference, and is such that all straight lines drawn from a certain point within the figure to the circumference, are equal to one another.
Página 23 - RULE. From half the sum of the three sides, subtract each side separately; multiply the half sum and the three remainders together, and the square root of the product will be the area required.