Which of these represents the vector equation of a line, \( \mathbf{r} \), where \(\mathbf{a}\) is a point on the line and \(\mathbf{d}\) is a vector parallel to the line?

\( \mathbf{r} = \mathbf{a} + \lambda \mathbf{d} \)

\( \mathbf{r}.\mathbf{a} = \mathbf{a}.\mathbf{d} \)

\(\mathbf{r} = \mathbf{a}.\mathbf{d} \)

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Geometry

Domhnall Murphy 2 questions 2.0 (2 ratings)

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1Which of these is the equation of a circle or radius \(a\) centred at the origin, \( (0,0) \), in Cartesian coordinates \( (x,y) \)?
1. A\(y = mx + c\)
2. B\(x^2 = a^2 - y^2\)
3. C\(x + y = a\)
2Which of these represents the vector equation of a line, \( \mathbf{r} \), where \(\mathbf{a}\) is a point on the line and \(\mathbf{d}\) is a vector parallel to the line?
1. A\( \mathbf{r} = \mathbf{a} + \lambda \mathbf{d} \)
2. B\( \mathbf{r}.\mathbf{a} = \mathbf{a}.\mathbf{d} \)
3. C\(\mathbf{r} = \mathbf{a}.\mathbf{d} \)

Description: A Levels Maths Quiz on Geometry, created by Domhnall Murphy on 28/08/2013.
Author: Domhnall Murphy
Language: English
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Tags: maths maths a levels
Rating: 2.0 out of 5 · 2 ratings
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