RBSE Solutions for Class 7 Maths Chapter 7 Lines and Angles In Text Exercise

RBSE Solutions for Class 7 Maths Chapter 7 Lines and Angles In Text Exercise is part of RBSE Solutions for Class 7 Maths. Here we have given Rajasthan Board RBSE Class 7 Maths Chapter 7 Lines and Angles In Text Exercise.

Board	RBSE
Textbook	SIERT, Rajasthan
Class	Class 7
Subject	Maths
Chapter	Chapter 7
Chapter Name	Lines and Angles
Exercise	In Text Exercise
Number of Questions	14
Category	RBSE Solutions

Rajasthan Board RBSE Class 7 Maths Chapter 7 Lines and Angles In Text Exercise

(Page 91)
Question 1
Look at the following angles and identify (RBSESolutions.com) whether it is an acute angle, a right angle or an obtuse angle.

Solution:
(i) Obtuse angle
(ii) Right angle
(iii) Acute angle

Question 2
What will be the (RBSESolutions.com) complementary angle of 45°?
Solution:
Let x is the complement of 45°
Then x + 45° = 90°
⇒ x = 90° – 45° = 45°
∴ Complement angle of 45° = 45°

Question 3
Which of the following (RBSESolutions.com) pairs angles are complement angles :

Solution:
(i) 40° + 50° = 90° are complement angles,
(ii) 30° + 50° = 80° 90° not complement angles,
(iii) 75° + 15° = 90° complement angles.

(Page 92)
Question 1
Which of the following (RBSESolutions.com) pairs of angles are supplementary.


Solution:
(i) 50° + 130° = 180° supplement angles.
(ii) 105° + 75° = 380° supplement angles.
(iii) 45° + 100° = 145° * 180° not supplement angles.

Question 2
In the given figures you can (RBSESolutions.com) observe two angle placed next to each other. Were else you find two angles placed next toe ach other?

Solution:
Wind mill, Comer of walls.

(Page 95)
Question 1
Look at the following (RBSESolutions.com) figures carefully and identify the parallel lines :

Solution:
Parallel lines are (RBSESolutions.com) shown by arrows :

Question 2
Look at the figures given (RBSESolutions.com) below carefully and identify the intersecting lines.

Solution:
intersecting lines (RBSESolutions.com) are shown by arrows.

Do And Learn

(Page 91)
Question 1
Can two acute angles be (RBSESolutions.com) complementary angles of each other?
Solution:
Yes, two acute angels can be complement to each other if their sum is 90°.

Question 2
Can two obtuse angles be complementary angles of each other?
Solution:
No, two obtuse angles can not be complement to each other because their sum is never 90°.

Question 3
What is the (RBSESolutions.com) complementary angle of a right angle?
Solution:
0° is the complement angle of 90°.

(Page 95)
Question 1
How many transversal lines can be drawn for a pair of lines?
Solution:
An infinite number of transversals can be drawn for a pair of lines.

Question 2
If a transversal line is (RBSESolutions.com) drawn on three lines, then how many points of intersection will we get?
Solution:
If a transversal line intersects three straight lines then three points A, B and C will be find.

(Page 96)
Question 1
Identify the pairs of angle in (RBSESolutions.com) each figure and write their name.


Solution:
(i) ∠3 and ∠4 are alternate angles.
(ii) ∠7 and ∠8 are alternate angles.
(iii) ∠1 and ∠2 are linear pair.
(iv) ∠5 and ∠6 are internal angles.
(v) ∠9 and ∠10 are corresponding angles.

(Page 97)
Question 1
Look at the (RBSESolutions.com) following and answer :

l ॥ m, L Transversal ∠x = ?
(ii)

L₁, L₂ are two lines (RBSESolutions.com) and t is transversal line Is ∠1 = ∠2 ?
Solution:
(i) In figure, l ॥ m and L in a transversal line
∴ ∠x = 70°(altemate angle)
(ii) In figure ∵ L₁ ≠ L₂
∴ ∠1 ≠ ∠2

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