NCERT Solutions for Class 6 Maths Chapter 4 Basic Geometrical Ideas Ex 4.4

For all the students of Dehradun school or all the students of St. Joseph’s School in which NCERT book is being run, we have provided all the NCERT solutions for class six questions to get more marks in the examination of their school. From this, students will be able to read Exercise 4 Point 4 of Chapter 4, understand it and download it which is started by the question.

NCERT Solutions for Class 6 Maths Chapter 4 Basic Geometrical Ideas Ex 4.4

Question 1.
Draw a rough sketch of a triangle ABC. Mark a point P in its interior and a point Q in its exterior. Is the point A in its exterior or in its exterior?
Solution :

The point A is neither in the exterior nor in the interior of triangle ABC. It is on the triangle ABC.

Question 2.
(a) Identify three triangles in the figure.
(b) Write the names of seven angles,
(c) Write the names of the six line segments,
(d) Which two triangles have ∠B as common?
Solution :
(a) Three triangles
Triangle ABC,
Triangle ABD,
Triangle ADC

(b) Seven Angles
∠ABC. ∠ACB, ∠BAC, ∠BAD, ∠CAD, ∠ADB and ∠ADC
(c) Six line segments
AB¯, AC¯, BC¯, AD¯, BD¯, DC¯
(d) ΔABC. ΔABD.

Question 1

Identify open and closed curves

Solution

• If endpoints do not meet → Open curve
• If endpoints meet → Closed curve

Answer:

$\text{Open Curve / Closed Curve}$

Question 2

Which figures are closed curves?

Solution

Figures where:

• Starting and ending points are same
• No gaps exist

Answer:

$\text{Circle, Triangle, Square}$

Question 3

Which figures are open curves?

Solution

Figures where:

• Endpoints are not joined

Answer:

$\text{Wavy lines, broken lines}$

Question 4

Identify curves in real life

Solution

• Road path → Open curve
• Ring → Closed curve
• Circle clock → Closed curve

Answer:

$\text{Open and Closed curves in real life objects}$