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Ex 9.1, 11 - Chapter 9 Class 11 Straight Lines
Last updated at August 11, 2026 by Teachoo
Chapter 9 Class 11 Straight Lines
Concept wise
- Cordinate geometry questions
-
Slope - Finding slope
- Slope - Prependicularity
- Angle between two lines by Slope
- Collinearity of 3 points by sliope
- Point Slope form
- Slope-Intercept form
- Intercept form
- Normal form
- Given Statement
- Two lines // or/and prependicular
- Angle between two lines
- Distance - Between two parallel lines
- Distance of a point from a line
- Distance of a point from a line along a line
- Other Type of questions - Area of Triangle formed
- Other Type of questions - 3 lines Concurrent
- Other Type of questions - Image
- Other Type of questions - Mix
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Transcript
Ex10.1, 12 A line passes through (x1, y1) and (h, k) . If slope of the line is m, show that k y1 = m (h x1) . We know that slope of line passing through (x1, y1) and (x2, y2) is m = ( _2 _1)/( _2 _1 ) So, Slope of line passing through (x1, y1) and (h, k) is Here x1 = x1 , y1 = y1 x2 = h , y2 = k Putting values m = (k y1)/(h x1) m(h x1) = k y1 k y1 = m (h x1) Hence proved
