| 11. | In the following years it continued to expand, with two perpendicular lines in place by the end of 1978.
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| 12. | The third method is based upon a larger number of measurements, but does not require the drawing of perpendicular lines.
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| 13. | The product of the slopes of perpendicular lines is " 1, assuming that both of the slopes are finite.
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| 14. | A perpendicular line drawn from each of these angles results in an overlapping 27 degree wedge claimed by both states.
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| 15. | The attack team will be giving 20 minutes to cross the perpendicular lines from the home-base to the back-end and return.
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| 16. | Josh knew from his class work that the algebraic formula for perpendicular lines involved the negative reciprocal of a certain number.
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| 17. | Four valves, one on each side of the blast, one on a perpendicular line and a final valve had to be closed.
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| 18. | Horizontal and perpendicular lines are marked off on this face with cord, the interval suited to the size of the root system.
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| 19. | Then we erect a perpendicular line to the diameter in " D " that intersects the half circle in " C ".
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| 20. | Another method : Find the center, and hence the radius, by constructing tangent lines at both ends and constructing perpendicular lines to those.
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