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:
![Question 1 Answer](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjJQCblqBUQb0IRpRFberVkLUNq80GKghgrp8QtFQ7AIePcamJHh64Tupgfs8z4zznvJ--5M91j1qxBPAD55xpa3FUvYM-FYJVND4Tp9Ha1fv3qzMBMUREImw4LmAY7hUP3j9nTbop1Wc5bjijb1h80ulV4J_nltD4dzAIB0BjzLp4Crg1i3FDYX2M0iA/s16000-rw/1.png)
Point A doesn’t lie in the interior or exterior of triangle ABC.
Question 2:
![Question 2](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEi0BP7grJxWy63bmes8aop6Wkon_8hvSTRVke2YChQZg7Ra9p9aXVX37a9JxhEcPM6omO6DVAzTZd2Qq6t4C7j7R-xK5mpwTgaVaIKjoJL9w-pskkCQy7Qw-4fAxAe5alkEiKdAykLKCk0ryIMKgkoRXoQEK0iaDPeZLUalI7WWflKMbGRqBLHkTGXoNg/s16000-rw/2.png)
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
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