## Chapter 18 - Symmetry Solutions for Exercise 18.1

## FAQs on RD Sharma Class 7 Solutions Chapter 18 - Symmetry (Ex 18.1) Exercise 18.1 - Free PDF

**1. What are the lines of symmetry?**

The world around us is often symmetrical. When a line, shape, or object reproduces itself exactly in a mirror image, we say that is symmetry. A line of symmetry can be defined as the imaginary line running through the centre of an object and dividing it into two identical halves. When divided into two or more equal parts, symmetrical figures or shapes have an identical resemblance to their other parts.

**2. What are the lines of symmetry of the rhombus?**

There are two symmetrical lines in a rhombus. Rhombuses are divided into two halves by their lines of symmetry, and each half is the mirror image of the other half. Rhombuses are quadrilaterals with equilateral sides and different angles. When two sides of a rhombus are parallel, and the angles opposite each other are equal, they are called parallel lines.

Rhombuses are symmetrical shapes that have two lines of symmetry. A rhombus shares both of its symmetry lines with its diagonal. Thus, the two diagonals of the rhombus form both lines of symmetry.

**3. What are the lines of symmetry of an isosceles triangle?**

Additionally, there are two equal sides on the interior of the triangle. Triangles with two equal sides are known as isosceles. As a result, every isosceles triangle has only one line of symmetry. A vertex may be drawn by connecting the midpoint of each side to the vertex of each other. Thus, an isosceles triangle has one line of symmetry.

**4. What are the lines of symmetry of a kite?**

If the adjacent sides of two disjoint quadrilaterals are equal, the quadrilateral will be referred to as a kite. Polygons can be divided into two mirror-image halves by reflecting them over a line that divides them into symmetrical halves. Kites have a line of symmetry running down the centre.

**5. What are the Lines of Symmetry of an isosceles trapezium?**

A perpendicular bisector joins the two sides of the isosceles trapezium, the plane of symmetry. There is no symmetry in a scalene triangle. The perpendicular bisector of the base is the line of symmetry in the isosceles triangle. Look into this https://www.vedantu.com/question-answer/the-number-of-lines-of-symmetry-in-a-trapezium-Class-7-Mathss-cbse-604a4982cb615b4c750b070f from Vedantu.com to learn more about isosceles trapezium.