AP State Syllabus AP Board 7th Class Maths Solutions Chapter 4 Lines and Angles Ex 1 Textbook Questions and Answers.

## AP State Syllabus 7th Class Maths Solutions 4th Lesson Lines and Angles Exercise 1

Question 1.

Name the figure drawn below.

Solution:

Line segment \(\overline{\mathrm{AB}}\)

Ray \(\overline{\mathrm{DC}}\)

Line \(\overline{\mathrm{SY}}\)

Point P

Question 2.

Draw the figures for the following.

(i) \(\overline{\mathrm{OP}}\)

(ii) Point X

(iii) \(\overline{\mathrm{RS}}\)

(iv) \(\overline{\mathrm{CD}}\)

Solution:

Question 3.

Name all the possible line segments in the figure.

Solution:

\(\overrightarrow{\mathrm{AB}}, \widehat{\mathrm{BC}}, \overline{\mathrm{CD}}, \overline{\mathrm{AC}}, \overline{\mathrm{AD}}, \overline{\mathrm{BD}}\)

Question 4.

Write any five examples of angles that you have observed arround.

Example: The angle formed when a scissor is opened.

Solution:

i) Angle formed when a door is opened.

ii Angle between two adjacent edges of a blackboard.

iii) Angle between two adjacent edges of a ruler.

iv) Angle between two adjacent edges of a set square.

v) Angle formed at elbow.

Question 5.

Identify the following given angles as acute, right or obtuse.

Solution:

i) acute

ii) obtuse.

iii) right

iv) acute

v) obtuse.

Question 6.

Name all the possible angles you can find in the following figure. Which are acute, right, obtuse and straight angles?

Solution:

Acute angles = ∠AOF,∠FOE, ∠EOD, ∠DOC, ∠COB, ∠EOC, ∠DOB, ∠DOF

Obtuse angles = ∠AOD, ∠AOC, ∠BOF

Right angle = ∠AOE,∠BOE

Question 7.

Which of the following pairs of lines are parallel? Why?

Solution:

Figure (i) and (iv) are pairs of parallel lines because however long they are produced, they

never intersect each other.

Question 8.

Which of the following lines are intersecting?