**.**

**NCERT Solutions for Class 8 Maths Chapter 3 Understanding Quadrilaterals Ex 3.1**

**Ex 3.1 Class 8 Maths Question 1.**

Given
here are some figures.Classify
each of them on the basis of the following:

(a) Simple curve

(b) Simple closed curve

(c) Polygon

(d) Convex polygon

(e) Concave polygon

**Solution:****
**(a)
Simple curve: (1), (2), (5), (6) and (7) are simple curves.

(b) Simple closed curve: (1), (2), (5), (6) and (7) are simple curves.

(c) Polygon: (1) and (2) are polygons.

(d) Convex polygon: (2) is convex polygon.

(e) Concave polygon: (1) is concave polygon.

**Ex 3.1 Class 8 Maths Question 2.**

What is a regular polygon? State the name of a
regular polygon of(i) 3 sides (ii) 4 sides (iii) 6 sides

**Solution:
**A polygon, whose all sides and all angles are equal,
is called a regular polygon.

(i) A polygon with 3 sides is called an

**equilateral triangle**.

(ii) A polygon with 4 sides is called a

**square**.

(iii) A polygon with 6 sides is called a

**regular hexagon**.

**Related Links:**

**NCERT Solutions for Maths Class 9**

**NCERT Solutions for Maths Class 10**

**NCERT Solutions for Maths Class 11**