College Algebra Tutorial 28: Parallel and Perpendicular Lines

Parallel & perpendicular lines perpendicular

perpendicular · erect · on end · plumb Strong matches straight · upright Weak match vertical

perpendicular Key Takeaways · Parallel lines have the same slope · Perpendicular lines have slopes that are opposite reciprocals In other words, if m=ab, Two lines are perpendicular if and only if the product of their slopes is -1 If the slopes of two lines which are perpendicular are m1 Lines that are perpendicular intersect to form a 90∘ 90 ∘ angle The slope of one line is the negative reciprocal of the other We can show that two lines are

ตรวจสลาก16กุมภาพันธ์2566 At right angles to one another Can be of two lines, two planes, a line and a plane, or a line and a surface From: perpendicular in The Concise Oxford