 | Charles Hutton - Geometry - 1770 - 518 pages
...determined by Euclid. — He hath left us alfo his attempts upon the circle : He proved that a circle is equal to a right-angled triangle whofe bafe is equal to the circumference and its altitude equal to the radius ; and confequently that its area is found by drawing the radius into half the circumference... | |
 | William Scott - Measurement - 1845 - 288 pages
...expresses the area of the triangle. Whence the area of a circle is equal to that of a triangle whose base is equal to the circumference, and its altitude to the radius of the circle. Examples. 1st. Given d— 12: required s. Ans. 8=113.0976. 2d. Given r = 100 feet : required s. Ans.... | |
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He hath left us alfo his attempts upon the circle : He proved that a circle is equal to a right-angled triangle whofe bafe is equal to the circumference and its altitude equal to the radius ; and confequently that its area is... 