 | George Albert Wentworth - Geometry - 1888 - 264 pages
...sides has an equiangular polygon, four of whose angles are together equal to seven right angles ? 50. How many sides has a polygon, the sum of whose interior angles is equal to the sum of its exterior angles ? 51. How many sides has a polygon, the sum of whose interior... | |
 | Edward Albert Bowser - Geometry - 1890 - 418 pages
...is produced to D, so that BD is equal to BC : prove that the angle ABC is double the angle ADC. 6. How many sides has a polygon, the sum of whose interior angles is four times that of its exterior angles? MISCELLANEOUS THEOREMS. Proposition 38. Theorem. 152. If three... | |
 | George Albert Wentworth - Geometry - 1895 - 468 pages
...has an equiangular polygon, four of whose angles are together equal to seven right angles ? 50. Hovr many sides has a polygon, the sum of whose interior angles is equal to the sum of its exterior angles ? 51. How many sides has a polygon, the sum of whose interior... | |
 | George Albert Wentworth - Geometry - 1896 - 296 pages
...by g 205, Sum of the A = (x-2) 180°. ... each Z = (*-2)180°. .-, 4(a;-2)180° = 630°. xx Ex. 50. How many sides has a polygon, the sum of whose interior angles is equal to the sum of its exterior angles ? Let x denote the number of sides. Then Bum of interior £... | |
 | Wooster Woodruff Beman, David Eugene Smith - Geometry - 1899 - 400 pages
...30 sides ? 120. How many degrees in each angle of a regular polygon of 12 sides ? of 20 sides ? 121. How many sides has a polygon the sum of whose interior angles is 48 right angles ? 122. The vertical angle of a certain isosceles triangle is 11° 15' 20"; how large... | |
 | William James Milne - Geometry - 1899 - 398 pages
...has a polygon the sum of whose exterior angles is double the sum of its interior angles ? Ex. 121. How many sides has a polygon the sum of whose interior angles is equal to the sum of its exterior angles ? Ex. 122. The perimeter of an isosceles triangle is 176 feet,... | |
 | James Howard Gore - Geometry - 1899 - 266 pages
...lines of a triangle is less than the perimeter, and greater than half the perimeter of the triangle. 6. How many sides has a polygon, the sum of whose interior angles is double that of its exterior angles ? 7. If BC, the base of an isosceles triangle ABC, is produced to... | |
 | William James Milne - Geometry, Modern - 1899 - 258 pages
...has a polygon the sum of whose exterior angles is double the sum of its interior angles ? Ex. 121. How many sides has a polygon the sum of whose interior angles is equal to the sum of its exterior angles ? Ex. 122. The perimeter of an isosceles triangle is 176 feet,... | |
 | Wooster Woodruff Beman, David Eugene Smith - Geometry, Modern - 1899 - 272 pages
...30 sides ? 120. How many degrees in each angle of a regular polygon of 12 sides ? of 20 sides ? 121. How many sides has a polygon the sum of whose interior angles is 48 right angles ? 122. The vertical angle of a certain isosceles triangle is 11° 15' 20"; how large... | |
 | William James Milne - Geometry - 1899 - 326 pages
...— 2)2 rt. A = 6 rt. ¿a = 540°, and since there are 5 A each one = ¿ of 540° = 108°. Ex. 109. How many sides has a polygon the sum of whose interior angles is double the sum of its exterior angles ? Solution. § 167, the sum of the ext. A _- 4 rt. A ; ... the... | |
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How many sides has a polygon, the sum of whose interior angles is equal to the sum of its exterior angles ? 51. 
