# Are lines of symmetry also diagonals in a polygon?

|The diagonal of a parallelogram also divides the figure into two triangles that are congruent. But the diagonal line is NOT a line of symmetry. In regular polygons (where all sides are congruent and all angles are congruent), the number of lines of symmetry equals the number of sides.

A general parallelogram has no lines of symmetry. Some special ones (rhombus, **rectangle**, square) have lines of symmetry. However, a parallelogram does have a crucial symmetry – the **half**-turn around the central point where they two diagonals intersect.

Also, how many lines of symmetry does a polygon have? four lines

Herein, which quadrilaterals have diagonals that are not lines of symmetry?

The trapezoid **has** only a vertical **line of symmetry**. The parallelogram **has no lines of symmetry** and, as with the rectangle, students should experiment with folding a copy to see what happens with the **lines** through the **diagonals** as well as horizontal and vertical **lines**.

How do you find the line of symmetry of a polygon?

You can **find** if a shape has a **Line of Symmetry** by folding it. When the folded part sits perfectly on top (all edges matching), then the fold **line** is a **Line of Symmetry**.

### What are the 4 types of symmetry?

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

### How many lines of symmetry does a rectangle have?

two lines

### How many lines of symmetry does a?

Those letters cannot be folded in half in any way with the parts matching up. The rest of the letters, A, B, C, D, and E all have only 1 line of symmetry. Notice that the A has a vertical line of symmetry, while the B, C, D, and E have a horizontal line of symmetry.

### What are the 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.

### How do you teach symmetry?

Symmetry Art Project Take a blank sheet of paper. Fold it in two halves and open it again. Squish some wet paint on one half, fold it back again and then press it slightly. Now when we unfold the paper, a miraculously beautiful, symmetrical design appears on both sides of the paper.

### Does a parallelogram have 1 line of symmetry?

1 Answer. General parallelogram has no lines of symmetry.

### Does a rhombus have 1 line of symmetry?

A rhombus has two lines of symmetry that run through one vertex to the one directly across it. Unlike a square, planes through the center of each edge of a rhombus do not yield mirrored sides.

### What type of symmetry does a rectangle have?

Rectangle: (i) Linear symmetry possesses 2 lines of symmetry. Line joins the mid-point of 2 parallel sides. (ii) Point symmetry possesses point symmetry with point of intersection of diagonals as the centre of symmetry. (iii) Rotational symmetry possesses rotational symmetry of order 2.

### Is a rectangle perpendicular?

As you can see from the pictures to the left, the diagonals of a rectangle do not intersect in a right angle (they are not perpendicular). (Unless the rectangle is a square.) And the angles formed by the intersection are not always the same measure (size). Opposite central angles are the same size (they are congruent.)

### What is a line of symmetry in math?

The “Line of Symmetry” (shown here in white) is the imaginary line where you could fold the image and have both halves match exactly. See: Symmetry. Reflection Symmetry.

### How many lines of symmetry does a trapezoid have?

0

### Has at least one line of symmetry?

One shape that has at least one line of symmetry is a rectangle. A rectangle has two lines of symmetry. Other examples of shapes that have at least one line of symmetry include a square, with four lines of symmetry, and an equilateral triangle, with three lines of symmetry.

### How do you find area?

The simplest (and most commonly used) area calculations are for squares and rectangles. To find the area of a rectangle multiply its height by its width. For a square you only need to find the length of one of the sides (as each side is the same length) and then multiply this by itself to find the area.

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