CBSE - Class 9 - Maths - Lines and Angles (Ex. 6.3)

Lines and Angles  

(NCERT Ex. 6.3 + Q & A from CBSE papers)

Points to remember

1. The sum of the angles of a triangle is 180º.

Impossible Triangle
(credits:openclipart)

2. If a side of a triangle is produced, then the exterior angle so formed is equal to the sum of the two interior opposite angles.

3. An exterior angle of a triangle is greater than either of its interior opposite angles.

4. If one angle of a triangle is a right angle, then the other two angles are acute angles. (Thus no triangle can have two right angles.)

5. The two acute angles in every right triangle are complementary.

6. The sum of all interior angles of an n-sided polygon is (n -2) × 180°

7. The sum of all exterior angles of an n-sided polygon is 360°.(one exterior angle at each vertex)

CBSE Class 9 English (Comm). SA1- Grammar - Verb Forms

Class 9 English (Comm). SA1- Grammar - Verb Forms

(Q & A from CBSE Examination)

Q(CBSE 2011): Complete the following by choosing the correct answer from the options given below:

(a) In a new audio recording, the leader of the Yemen branch of Al Qaeda, __________ by the Obama administration‘s alleged decision to authorize the assassination of an American - born Islamic cleric linked to the Ft. Hood shooting and attempted Christmas Day airplane terrorism  plots.
(I) warned Americans they will be harmed
(II) had warned Americans they will be harmed
(III) has warned Americans that they will be harmed.
(IV) has been warned Americans, they will be harmed

CBSE Class 9 - French SA1 Paper (Solved)

Class 9- French - SA1 Paper 2010
(SQP from CBSE)

CBSE Class 7 Science - CH10 - Respiration in Organisms (#eduvictors)(#class7Science)

Respiration in Organisms

NCERT Chapter Solutions and other Q & A

Q1: How breathing is different from respiration?

Answer:

S.No.	Breathing	Respiration
1	It involves the intake of oxygen and release of Carbon dioxide.	Respiration is more complex and it includes breathing as well as oxidation of food in cells to release energy.
2	It is a physical process i.e. exchange of gases.	It is a biochemical process in which food is broken along with the release of energy.
3	It involves breathing organs e.g. lungs in mammals.	It occurs at a cellular level

CBSE Class 9 - Social Science - Nazism and the Rise of Hitler

Nazism and the Rise of Hitler

Charlie Chaplin as Hilter in 'The Great Dictator'
The two contemporaries... Chaplin who won heart of millions
and other killed millions!
image credits:wikipedia

MCQs

Q1: When the First World War was fought?
(a) 1911-1914
(b) 1914-1918
(c) 1916-1920
(d) 1941-1945

Q2: During First World War against whom Germany did not fight?
(a) Austria
(b) England
(c) France
(d) Belgium

Class 10 English (Comm.) workbook - Unit 13 - REPORTED SPEECH

REPORTED SPEECH

A.1 Read and enjoy the following article.

The Road to English

(Adapted from an article by Arishban Bagchi (Hindu college)
[The Hindustan Times, 4 October 1996]

1. The great question, after you have failed to put yourself in an engineering or medical college in contemporary Indian society, is whether you'll ever find a job.

CBSE - Class 9 - Hindi (B) SA1 Paper (हिंदी-ब)(#eduvictors)(#class9Hindi)

Class 9- Hindi-B - SA1 Paper (हिंदी-ब)