# HSSlive: Plus One & Plus Two Notes & Solutions for Kerala State Board

## AP Board Class 7 Maths Chapter 4 Lines and Angles Ex 4.1 Textbook Solutions PDF: Download Andhra Pradesh Board STD 7th Maths Chapter 4 Lines and Angles Ex 4.1 Book Answers

 AP Board Class 7 Maths Chapter 4 Lines and Angles Ex 4.1 Textbook Solutions PDF: Download Andhra Pradesh Board STD 7th Maths Chapter 4 Lines and Angles Ex 4.1 Book Answers

## Andhra Pradesh State Board Class 7th Maths Chapter 4 Lines and Angles Ex 4.1 Books Solutions

 Board AP Board Materials Textbook Solutions/Guide Format DOC/PDF Class 7th Subject Maths Chapters Maths Chapter 4 Lines and Angles Ex 4.1 Provider Hsslive

2. Click on the Andhra Pradesh Board Class 7th Maths Chapter 4 Lines and Angles Ex 4.1 Answers.
3. Look for your Andhra Pradesh Board STD 7th Maths Chapter 4 Lines and Angles Ex 4.1 Textbooks PDF.
4. Now download or read the Andhra Pradesh Board Class 7th Maths Chapter 4 Lines and Angles Ex 4.1 Textbook Solutions for PDF Free.

## AP Board Class 7th Maths Chapter 4 Lines and Angles Ex 4.1 Textbooks Solutions with Answer PDF Download

Find below the list of all AP Board Class 7th Maths Chapter 4 Lines and Angles Ex 4.1 Textbook Solutions for PDF’s for you to download and prepare for the upcoming exams:

Question 1.
Find which of the following pair of angles are complementary and which are supplementary?

90° + 20° = 1 10° ≠ 90° (or) ≠ 180°
So, they are not complementary or not supplementary.

6o° + 30° = 90°
So, they are complementary angles.

11°+ 79° = 90°
So, they arc complementary angles.

125° + 55° = 180°
So, they are supplementary angles.

50 + 130° = 180°
So, they are supplementary angles.

40° + 120° = 160° ≠ 90° (or) 180°
So, they are not complementary angles or not supplementary angles.

Question 2.
If the ratio of two complementary angles is 2:3, then find the two angles.
Given the ratio of two complementary angles = 2 : 3 = 2x : 3x
Sum of the complementary angles = 90° So, 2x + 3x = 90°
⇒ 5x = 90°
⇒ 5𝑥5=905
∴ x = 18°
Then the angles are
2x, 3x = 2(18°), 3(18°) = 36°, 54°

Question 3.
In the figure, ∠A and ∠Q are complementary angles. Find the value of x.

Given ∠A = 9x°, ∠Q = 36° and
∠A and ∠Q are complementary angles.
So, ∠A + ∠Q = 90°
⇒ 9x + 36° = 90°
⇒ 9x + 36° – 36° = 90° – 36°
⇒ 9x = 54°
⇒ 9x9=549
⇒ x = 6° .

Question 4.
If ∠A and ∠B are conjugate angles and ∠A = ∠B. Find the two angles.
Given ∠A and ∠B are conjugate angles and
∠A = ∠B = x°
So, ∠A + ∠B = 360°
⇒ x° + x° – 360°
⇒ 2x° = 360°
⇒ 2𝑥2=3602
⇒ x = 180°
∴ ∠A = ∠B = x° = 180°

Question 5.
Draw a pair of complementary angles and a pair of supplementary angles.

Question 6.
Teacher asked students to draw the complementary angle to the given angle. The students have drawn as follows. Who is correct?

Sum of the two angles is 90°, then they are called complementary angles.
Complementary angle of 30° is 60°. So, Sujatha is correct.

Question 7.
In the given figure, ∠B and ∠E are supplementary angles. Find x.

Given ∠B and ∠E are supplementary angles.
∠B + ∠E = 180°
⇒ 30° + 5x = 180°
⇒ 30° + 5x – 30° = 180°- 30°
⇒ 5x = 150°
⇒ 5𝑥5=1505
∴ x = 30°

Question 8.
Ashritha said, “In the pair of supplementary angles, one angle must be obtuse angle.” Do you agree? Give reason.
No, two acute angles cannot make supplementary angles. Two right angles (90°) can make supplementary angles. One acute and one obtuse angles can make supplementary angles.

Question 9.
Find the angle which is 40° more than its supplementary angle?
Let one angle is x°.
Other angle is (x + 40)°.
Given two angles are supplementary.
So, x + x + 40° = 180°
⇒ 2x + 40° = 180°
⇒ 2x + 40° – 40° = 180° – 40°
⇒ 2x = 140°
⇒ 2𝑥2=1402
Angle x = 70°
Other angle is x + 40° = 70° + 40° = 110°
∴ Angles are 70° and 110°.

Question 10.
Srinu said, “Two obtuse angles cannot be supplementary.” Do you agree? Justify your answer.
Yes, sum of two obtuse angles is greater than 180°.

## Andhra Pradesh Board Class 7th Maths Chapter 4 Lines and Angles Ex 4.1 Textbooks for Exam Preparations

Andhra Pradesh Board Class 7th Maths Chapter 4 Lines and Angles Ex 4.1 Textbook Solutions can be of great help in your Andhra Pradesh Board Class 7th Maths Chapter 4 Lines and Angles Ex 4.1 exam preparation. The AP Board STD 7th Maths Chapter 4 Lines and Angles Ex 4.1 Textbooks study material, used with the English medium textbooks, can help you complete the entire Class 7th Maths Chapter 4 Lines and Angles Ex 4.1 Books State Board syllabus with maximum efficiency.

## FAQs Regarding Andhra Pradesh Board Class 7th Maths Chapter 4 Lines and Angles Ex 4.1 Textbook Solutions

#### Can we get a Andhra Pradesh State Board Book PDF for all Classes?

Yes you can get Andhra Pradesh Board Text Book PDF for all classes using the links provided in the above article.

## Important Terms

Andhra Pradesh Board Class 7th Maths Chapter 4 Lines and Angles Ex 4.1, AP Board Class 7th Maths Chapter 4 Lines and Angles Ex 4.1 Textbooks, Andhra Pradesh State Board Class 7th Maths Chapter 4 Lines and Angles Ex 4.1, Andhra Pradesh State Board Class 7th Maths Chapter 4 Lines and Angles Ex 4.1 Textbook solutions, AP Board Class 7th Maths Chapter 4 Lines and Angles Ex 4.1 Textbooks Solutions, Andhra Pradesh Board STD 7th Maths Chapter 4 Lines and Angles Ex 4.1, AP Board STD 7th Maths Chapter 4 Lines and Angles Ex 4.1 Textbooks, Andhra Pradesh State Board STD 7th Maths Chapter 4 Lines and Angles Ex 4.1, Andhra Pradesh State Board STD 7th Maths Chapter 4 Lines and Angles Ex 4.1 Textbook solutions, AP Board STD 7th Maths Chapter 4 Lines and Angles Ex 4.1 Textbooks Solutions,
Share: