Exercise 4.4

Class 6 | Mathematics | 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 1:

Point A lies on ΔABC.

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 2 : (a) The three triangles are: ∠ABC,∠ABD,∠ADC

(b) Angles are:∠ADB, ∠ADC,∠ABD,∠ACD,∠BAD,∠CAD,∠BAC

(c)Line segments are: AB¯, AC¯, AD¯, BD¯, DC¯, BC¯

(d) Triangles having common∠B: ΔABC, ΔABD