The DAV Maths Book Class 3 Solutions and **DAV Class 3 Maths Chapter 12 Worksheet 1** Solutions of Geometry offer comprehensive answers to textbook questions.

## DAV Class 3 Maths Ch 12 WS 1 Solutions

Question 1.

Name four objects having a plane edges.

Solution:

(i) Slate

(ii) Note (money)

(iii) Stamp

(iv) Book

Question 2.

Name four objects having a curved surface.

Solution:

(i) Football

(ii) Guave, apple, etc

(iii) Globe

(iv) Sun, moon, etc

Question 3.

Name four objects having both plane and curved surfaces.

Solution:

(i) Milk bottle

(ii) Pencil

(iii) Chalk

(iv) Stick

Question 4.

Tick (✓) the correct answer.

(a) Globe has a (plane/curved) surface.

Solution:

Curved surface

(b) Mirror has a (plane/curved) surface.

Solution:

Plane surface

(c) Playing card has a (plane/curved) surface.

Solution:

Plane surface

(d) Laddoo has a (plane/curved) surface.

Solution:

Curved surface

(e) Burfi has a (plane/curved) surface.

Solution:

Plane surface

(f) 100 rupee note has a (plane/curved) surface.

Solution:

Plane surface

### DAV Class 3 Maths Chapter 12 Worksheet 1 Notes

- Part of a solid which we can see and touch is called the surface of the solid.
- Some common shapes of solids are cuboid, cube, cylinder, cone, sphere, etc.
- A dot is called a point which gives us idea of a location.
- A line segment has two end points which can be measured.
- A ray is a straight path which extends endlessly in one direction.
- We can measure a line segment with a scale.

**Lines and Shapes**

The part of a straight line between two points is called a line segment.

So between A and B we have line segment AB.

One straight line can pass through two points.

It we draw curved line between two point A and B to continue the line by moving the pencil from B to A along a different path we will get a closed shape.

E.g.

**Flat Shapes**

**Plane Surfaces and Curved Surfaces**

The part of a solid which we can see and touch is called surface of the solid.

**Let us have fun with shapes**

Question 1.

Today is Neha’s birthday. She is planning to give return gifts to all her friends. See the gifts packs given below and identify the shapes. [Textbook Page 129]

Solution:

Conical, Square, Circle, Rectangle, Cylindrical.

Question 2.

Count the number of squares, circles, rectangles and triangles from the picture given below. [Textbook Page 129]

Solution:

Squares – 3

Triangle – 1

Rectangles – 7

Circles – 8.