Line of symmetry equation

How do you find the equation of the axis of symmetry?

STANDARD FORM The graph of the parabola represented by the quadratic function y = a( x – p )2 + q has an axis of symmetry represented by the equation of the vertical line x = p.

What is the meaning of line of symmetry?

A line of symmetry is a line that cuts a shape exactly in half. This means that if you were to fold the shape along the line, both halves would match exactly. Equally, if you were to place a mirror along the line, the shape would remain unchanged. A square has 4 lines of symmetry, as shown below.

How do you find the line of symmetry using completing the square?

By completing the square, we have y=x2−8x+10=(x−4)2−6 which is a translation of the graph y=x2 by (4−6). The line of symmetry is therefore translated to x=4 and the vertex is translated to (4,−6).

What is the axis of symmetry examples?

The two sides of a graph on either side of the axis of symmetry look like mirror images of each other. Example: This is a graph of the parabola y = x2 – 4x + 2 together with its axis of symmetry x = 2. The axis of symmetry is the red vertical line.

Can the axis of symmetry be negative?

When a=0, the graph is not a parabola but a line. In a parabola the axis of symmetry is x= -b/2a. When ‘a’ was positive the axis of symmetry was negative, and when a was negative the axis of symmetry was positive. In the second case when b=-1 and c=-3, the axis of symmetry was x=1/2a.

What is the 4 line of symmetry?

Square. A square has four lines of symmetry.

What are the 4 types of symmetry?

The four main types of this symmetry are translation, rotation, reflection, and glide reflection.

Which shape has 2 lines of symmetry?


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How do you solve for symmetry?

Test for symmetry about the y-axis: Replace x with (-x). Simplfy the equation. If the resulting equation is equivalent to the original equation then the graph is symmetrical about the y-axis. Example: Use the test for symmetry about the y-axis to determine if the graph of y – 5x2 = 4 is symmetric about the y-axis.

Is the line of symmetry the same as the vertex?

The graph of a quadratic function is a parabola. The axis of symmetry of a parabola is a vertical line that divides the parabola into two congruent halves. The axis of symmetry always passes through the vertex of the parabola . The x -coordinate of the vertex is the equation of the axis of symmetry of the parabola.

What is the line of symmetry in a quadratic equation?

A parabola is the graph of a quadratic function. Each parabola has a line of symmetry. Also known as the axis of symmetry, this line divides the parabola into mirror images. The line of symmetry is always a vertical line of the form x = n, where n is a real number.

What is axis of symmetry of a line?

A line through a shape so that each side is a mirror image. When the shape is folded in half along the axis of symmetry, then the two halves match up. In this photo the white line down the center is a vertical axis of symmetry. Also called the Line of Symmetry.

Can a line have a line of symmetry?

We often find symmetry in things around us. We say there is symmetry when the exact reflection or mirror image of a line, shape or object gets created. The line of symmetry can be defined as the axis or imaginary line that passes through the center of the shape or object and divides it into identical halves.

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