NCERT Class 6 Maths Chapter 4 Basic Geometrical Ideas Exercise 4.4

Chapter 4 Basic Geometrical Ideas Exercise 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 interior?
Answer:

Point A doesn’t lie in the interior or exterior of triangle ABC.

Question 2:

a) Identify three triangles in the figure.
b) Write the names of seven angles.
c) Write the names of six line segments.
d) Which two triangles have ∠B as common?
Answer:
a)
△ABC
△ABD
△ADC

b)
∠BAC
∠BAD
∠CAD
∠ADB
∠ADC
∠ABC
∠ACB

c)
line segment AB
line segment BC
line segment CA
line segment AD
line segment BD
line segment CD

d)
△ABD
△ABC