 | Richard Pears Wright - 1882 - 136 pages
...the space enclosed by this circumference and the fixed point as the centre of the circle. 128. Any straight line drawn from the centre to the circumference is a radius. Two or more such straight lines are termed radii. It follows from the definition of a circumference... | |
 | Euclid - 1845 - 336 pages
...it are equal. The bounding curve is called the circumference, the point within it the centre, every straight line drawn from the centre to the ' circumference is a radius, and every straight line drawn through the centre and terminated by the circumference is a diameter.... | |
 | 130 pages
...within it are equal. The bounding curve is the circumference, the point within it the centre, and every straight line drawn from the centre to the circumference is a radius. * It will be seen later (Art. 34) that it is sufficient to state that one angle is a right angle. Thus,... | |
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The bounding curve is called the circumference, the point within it the centre, every straight line drawn from the centre to the ' circumference is a radius, and every straight line drawn through the centre and terminated by the circumference is a diameter. 