 # How Do You Find The Vertex And Axis Of Symmetry?

## How many types of axis of symmetry are available?

The icosahedron and dodecahedron, being mutually dual, share their symmetry axes, so one model can show all 31 axes of either.

Again there are three kinds of axes..

## How do you find the axis of symmetry?

When a quadratic function is graphed in the coordinate plane, the resulting parabola and corresponding axis of symmetry are vertical. 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.

## How do you find the vertex?

This point, where the parabola changes direction, is called the “vertex”. If the quadratic is written in the form y = a(x – h)2 + k, then the vertex is the point (h, k). This makes sense, if you think about it. The squared part is always positive (for a right-side-up parabola), unless it’s zero.

## Is the vertex always on the axis of symmetry?

The vertex always occurs along the axis of symmetry. For a parabola that opens upward, the vertex occurs at the lowest point on the graph, in this instance, (−2,−1) . The x -intercepts, those points where the parabola crosses the x -axis, occur at (−3,0) and (−1,0) .

## 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.

## What is meant by axis of symmetry?

An axis of symmetry is a line about which a figure is symmetrical. If a figure can be folded such that the two parts exactly match, the fold line is an axis of symmetry.

## Can the axis of symmetry be negative?

When a<0, the parabola opens downward. 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.

## What are lines of symmetry?

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.