Question
Find the reflection matrix on the x-axis.
Hint:
There is only change in the y-coordinate of a point.
The correct answer is:
* Matrix representation is the efficient way for the transformation of points.
* Every vertex is placed in columns.
Given That:
the reflection matrix on the x-axis.
>>>Let, (a, b) be a point in the plane. Then, the point of reflection with respect to x-axis becomes (a, -b).
>>>Hence, the x-coordinate remains same and the y-coordinate changes it's sign with same magnitude.
>>>Therefore, [a]= 
and [b] = [0 -1].
>>>The matrix representation of the point on reflection with respect to x-axis :
The reflection matrix on the x-axis =
Related Questions to study
Write the matrix for the polygon.
From the graph, the coordinates of polygon are A(0, 2), B(0, 4), C(3, 5), and D(3, 1)
Write the matrix for the polygon.
From the graph, the coordinates of polygon are A(0, 2), B(0, 4), C(3, 5), and D(3, 1)
Find the image coordinates of the triangle ABC, if A (-4,0), B (-3,3) and C (-1,2), which is reflected along y-axis.
If (a, b) is reflected in the y-axis, its image is the point (-a, b).
(a, b) → (-a, b)
A (-4, 0) → A’ (4, 0)
B (-3, 3) → B’ (3, 3)
C (-1, 2) → C’ (1, 2)
Image coordinates of the triangle ABC are A’ (4, 0), B’ (3, 3) and C’ (1, 2).
Find the image coordinates of the triangle ABC, if A (-4,0), B (-3,3) and C (-1,2), which is reflected along y-axis.
If (a, b) is reflected in the y-axis, its image is the point (-a, b).
(a, b) → (-a, b)
A (-4, 0) → A’ (4, 0)
B (-3, 3) → B’ (3, 3)
C (-1, 2) → C’ (1, 2)
Image coordinates of the triangle ABC are A’ (4, 0), B’ (3, 3) and C’ (1, 2).
Find the image coordinates of the line AB, if A (6, 4) and B (6,1), which is reflected along y = -x
If (a, b) is reflected in the line y = -x, its image is the point (-b, -a).
(a, b) → (b, a)
A(6, 4) → A’(-4, -6)
B (6,1) → B’(-1, -6)
Image of the line A’( -4, -6), B’( -1, -6)
Find the image coordinates of the line AB, if A (6, 4) and B (6,1), which is reflected along y = -x
If (a, b) is reflected in the line y = -x, its image is the point (-b, -a).
(a, b) → (b, a)
A(6, 4) → A’(-4, -6)
B (6,1) → B’(-1, -6)
Image of the line A’( -4, -6), B’( -1, -6)
Find the image coordinates of the line AB, if A (6, 4) and B (6, 1), which is reflected along y = x
If (a, b) is reflected in the line y = x, its image is the point (b, a).
(a, b) → (b, a)
A (6, 4) → A’ (4, 6)
B (6, 1) → B’ (1, 6)
Image of line A’ (4, 6), B’ (1, 6)
Find the image coordinates of the line AB, if A (6, 4) and B (6, 1), which is reflected along y = x
If (a, b) is reflected in the line y = x, its image is the point (b, a).
(a, b) → (b, a)
A (6, 4) → A’ (4, 6)
B (6, 1) → B’ (1, 6)
Image of line A’ (4, 6), B’ (1, 6)
Graph the reflection of the polygon in the given line: y = -x
If (a, b) is reflected in the line y = -x, its image is the point (-b, -a).
(a, b) → (-b, -a)
A (-6, -4) → (4, 6)
B (-5, -1) → (1, 5)
C (-3, -2) → (2, 3)
Graph the reflection of the polygon in the given line: y = -x
If (a, b) is reflected in the line y = -x, its image is the point (-b, -a).
(a, b) → (-b, -a)
A (-6, -4) → (4, 6)
B (-5, -1) → (1, 5)
C (-3, -2) → (2, 3)
Graph the reflection of the polygon in the given line: y = x
If (a, b) is reflected in the line y = x, its image is the point (b, a).
(a, b) → (b, a)
A (-6, -4) → (-4, -6)
B (-5, -1) → ( -1, -5)
C (-3, -2) → (-2, -3)
Graph the reflection of the polygon in the given line: y = x
If (a, b) is reflected in the line y = x, its image is the point (b, a).
(a, b) → (b, a)
A (-6, -4) → (-4, -6)
B (-5, -1) → ( -1, -5)
C (-3, -2) → (-2, -3)
The vertices of a triangle are A (2, 3), B (6, 1) and C (7, 5). Graph the reflection of the triangle ABC in the given line y = 3
Point A is on the line, so its reflection is also on the same line (2, 3)
Point B is 2 units below the line, so its reflection is 2 units above the line at B’ (6, 5).
Point C is 2 units above the line, so its reflection is 2 units below the line at C’ (7, 1).
The vertices of a triangle are A (2, 3), B (6, 1) and C (7, 5). Graph the reflection of the triangle ABC in the given line y = 3
Point A is on the line, so its reflection is also on the same line (2, 3)
Point B is 2 units below the line, so its reflection is 2 units above the line at B’ (6, 5).
Point C is 2 units above the line, so its reflection is 2 units below the line at C’ (7, 1).
The vertices of a triangle are A(2,3), B (6,1) and C(7,5). Graph the reflection of the triangle ABC in the given line x-axis.
Point A is 2 units above the line, so its reflection is 2 units below the line at A’ (2, -3).
Point B is 1 unit above the line, so its reflection is 1 unit below the line at B’ (6, -1).
Point C is 5 units above the line, so its reflection is 5 units below the line at C’ (7, -5).
The vertices of a triangle are A(2,3), B (6,1) and C(7,5). Graph the reflection of the triangle ABC in the given line x-axis.
Point A is 2 units above the line, so its reflection is 2 units below the line at A’ (2, -3).
Point B is 1 unit above the line, so its reflection is 1 unit below the line at B’ (6, -1).
Point C is 5 units above the line, so its reflection is 5 units below the line at C’ (7, -5).
Graph the image of the triangle ABC, if A (-4, 0), B (-3, 3) and C (-1, 2), which is reflected along y= -x.
If (a, b) is reflected in the line y = -x, its image is the point (-b, -a).
(a, b) → (-b, -a)
A (-4, 0) → A’(0,4)
B(-3, 3) → B’(-3, 3)
C(-1, 2) → C’(-2, 1)
Image coordinates of the triangle ABC are A’(0,4), B’(-3, 3) and C’(-2, 1).
Graph the image of the triangle ABC, if A (-4, 0), B (-3, 3) and C (-1, 2), which is reflected along y= -x.
If (a, b) is reflected in the line y = -x, its image is the point (-b, -a).
(a, b) → (-b, -a)
A (-4, 0) → A’(0,4)
B(-3, 3) → B’(-3, 3)
C(-1, 2) → C’(-2, 1)
Image coordinates of the triangle ABC are A’(0,4), B’(-3, 3) and C’(-2, 1).
Find the image coordinates of the triangle ABC, if A (-4, 0), B (-3, 3) and C (-1, 2), which is reflected along x-axis.
If (a, b) is reflected in the x-axis, its image is the point (a, -b).
(a, b) → (a, -b)
A (-4, 0) → A’ (-4, 0)
B (-3, 3) → B’ (-3, -3)
C (-1, 2) → C’ (-1, -2)
Image coordinates of the triangle ABC are A’ (-4, 0), B’ (-3, -3) and C’ (-1, -2).
Find the image coordinates of the triangle ABC, if A (-4, 0), B (-3, 3) and C (-1, 2), which is reflected along x-axis.
If (a, b) is reflected in the x-axis, its image is the point (a, -b).
(a, b) → (a, -b)
A (-4, 0) → A’ (-4, 0)
B (-3, 3) → B’ (-3, -3)
C (-1, 2) → C’ (-1, -2)
Image coordinates of the triangle ABC are A’ (-4, 0), B’ (-3, -3) and C’ (-1, -2).
Find the image coordinates of the triangle ABC, if A (-4, 0), B (-3, 3) and C (-1, 2), which is reflected along y = -x.
If (a, b) is reflected in the line y = -x, its image is the point (-b, -a).
(a, b) → (-b, -a)
A (-4, 0) → A’ (0, 4)
B (-3, 3) → B’ (-3, 3)
C (-1, 2) → C’ (-2, 1)
Image coordinates of the triangle ABC are A’ (0, 4), B’ (-3, 3) and C’ (-2, 1).
Find the image coordinates of the triangle ABC, if A (-4, 0), B (-3, 3) and C (-1, 2), which is reflected along y = -x.
If (a, b) is reflected in the line y = -x, its image is the point (-b, -a).
(a, b) → (-b, -a)
A (-4, 0) → A’ (0, 4)
B (-3, 3) → B’ (-3, 3)
C (-1, 2) → C’ (-2, 1)
Image coordinates of the triangle ABC are A’ (0, 4), B’ (-3, 3) and C’ (-2, 1).
Find the image coordinates of the line AB, if A (3, 2) and B (5, 2), which is reflected along y -axis.
If (a, b) is reflected in the y-axis, its image is the point (-a, b).
A (3, 2) → A’ (-3, 2)
B (5, 2) → B’ (-5, 2)
Image of the line A’ (-3, 2), B’ ( -5, 2)
Find the image coordinates of the line AB, if A (3, 2) and B (5, 2), which is reflected along y -axis.
If (a, b) is reflected in the y-axis, its image is the point (-a, b).
A (3, 2) → A’ (-3, 2)
B (5, 2) → B’ (-5, 2)
Image of the line A’ (-3, 2), B’ ( -5, 2)
Graph the reflection of the polygon in the given line: y = -3
Point A is 1 unit below the line, so its reflection is 1 unit above the line at A’ (-6, -2).
Point B is 2 units above the line, so its reflection is 2 units below the line at B’ (-5, -5).
Point C is 1 unit above the line, so its reflection is 1 unit below the line at C’ (-3, -4).
Graph the reflection of the polygon in the given line: y = -3
Point A is 1 unit below the line, so its reflection is 1 unit above the line at A’ (-6, -2).
Point B is 2 units above the line, so its reflection is 2 units below the line at B’ (-5, -5).
Point C is 1 unit above the line, so its reflection is 1 unit below the line at C’ (-3, -4).
The vertices of a triangle are A (2,3), B (6,1) and C (7,5). Graph the reflection of the triangle ABC in the given line y-axis.
Point A is 2 units to the right of the line, so its reflection is 2 units to the left of the line at A’ (-2,3).
Point B is 6 units to the right of the line, so its reflection is 6 units to the left of the line at B’ (-6,1).
Point C is 7 units to the right of the line, so its reflection is 7 units to the left of the line at C’ (-7, 5).
The vertices of a triangle are A (2,3), B (6,1) and C (7,5). Graph the reflection of the triangle ABC in the given line y-axis.
Point A is 2 units to the right of the line, so its reflection is 2 units to the left of the line at A’ (-2,3).
Point B is 6 units to the right of the line, so its reflection is 6 units to the left of the line at B’ (-6,1).
Point C is 7 units to the right of the line, so its reflection is 7 units to the left of the line at C’ (-7, 5).
If (a, b) is reflected in the line y = -x, its image is the point ________.
If (a, b) is reflected in the line y = -x, its image is the point (-b, -a).
If (a, b) is reflected in the line y = -x, its image is the point ________.
If (a, b) is reflected in the line y = -x, its image is the point (-b, -a).
