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Facts that Matter: Coordinate Geometry | Mathematics (Maths) Class 10 PDF Download

Facts that Matter

  • Distance Formula
    I. The distance between two points P (x1, y1) and Q (x2, y2) is given by
    Facts that Matter: Coordinate Geometry | Mathematics (Maths) Class 10
    II. The distance of P (x, y) from the origin is
    Facts that Matter: Coordinate Geometry | Mathematics (Maths) Class 10
  • Section Formula
    I. If P (x, y) divides the line segment AB, joining the points A (x1, y1) and B (x2, y2) in the ratio m : n, then
    Facts that Matter: Coordinate Geometry | Mathematics (Maths) Class 10
    II. The coordinates (x, y) of the mid-point of PQ are given by:
    Facts that Matter: Coordinate Geometry | Mathematics (Maths) Class 10
    III. If A (x1, y1), B (x2, y2) and C (x3, y3) be the vertices of ΔABC, then the coordinates G (x, y) of the centroid of ΔABC are:
    Facts that Matter: Coordinate Geometry | Mathematics (Maths) Class 10

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FAQs on Facts that Matter: Coordinate Geometry - Mathematics (Maths) Class 10

1. What is the distance formula in coordinate geometry?
Ans. The distance formula is used to calculate the distance between two points in the coordinate plane. If you have two points \( (x_1, y_1) \) and \( (x_2, y_2) \), the distance \( d \) between them can be found using the formula: \[ d = \sqrt{(x_2 - x_1)^2 + (y_2 - y_1)^2}. \]
2. How do you find the midpoint between two points in coordinate geometry?
Ans. The midpoint \( M \) between two points \( (x_1, y_1) \) and \( (x_2, y_2) \) is calculated using the formula: \[ M = \left( \frac{x_1 + x_2}{2}, \frac{y_1 + y_2}{2} \right). \] This gives you the coordinates of the point that is exactly halfway between the two points.
3. What is the slope of a line in coordinate geometry?
Ans. The slope of a line measures its steepness and is calculated as the ratio of the rise (change in \( y \)) over the run (change in \( x \)). If you have two points \( (x_1, y_1) \) and \( (x_2, y_2) \), the slope \( m \) can be found using the formula: \[ m = \frac{y_2 - y_1}{x_2 - x_1}. \]
4. How do you write the equation of a line in slope-intercept form?
Ans. The slope-intercept form of a line's equation is expressed as: \[ y = mx + b, \] where \( m \) is the slope of the line and \( b \) is the y-intercept (the point where the line crosses the y-axis). To write an equation in this form, you need to know the slope and the y-intercept.
5. What are the conditions for two lines to be parallel in coordinate geometry?
Ans. Two lines are parallel in coordinate geometry if they have the same slope. If the equations of the lines are in slope-intercept form \( y = m_1x + b_1 \) and \( y = m_2x + b_2 \), the lines are parallel if \( m_1 = m_2 \) and \( b_1 \neq b_2 \).
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