CBSE ADDA

STD-9 SA-1  MODEL   QUESTION PAPER  _Hindi Download File STD-9 SA-1 MODEL QUESTION PAPER _Sanskrit Download File STD-9 SA-1 MODEL QUESTION PAPER _English Download File STD-9 SA-1 MODEL QUESTION PAPER _sst Download File STD-9 SA-1 MODEL QUESTION PAPER _science Download File STD-9 SA-1 MODEL QUESTION PAPER _Maths Download File STD-10 SA-1 MODEL QUESTION PAPER _sst Download File STD-10 SA-1 MODEL QUESTION PAPER _Science Download File STD-10 SA-1 MODEL QUESTION PAPER _Sanskrit Download File STD-10 SA-1 MODEL QUESTION PAPER _Maths Download File STD-10 SA-1 MODEL QUESTION PAPER _Hindi Download File STD-10 SA-1 MODEL QUESTION PAPER _English Download File

Click here to download latest DAV Sample Question paper Std. IX Practice Paper  2014 9th English DAV SA-1 Question paper Download File 9th Hindi DAV SA-1 Question paper Download File 9th Mathematics DAV SA-1 Question paper Download File 9th Sanskrit DAV SA-1 Question paper Download File 9th Science DAV SA-1 Question paper Download File 9th social science DAV SA-1 Question paper Download File Std. X  Practice Paper  2014 10th English DAV SA-1 Question paper Download File 10th Hindi DAV SA-1 Question paper Download File 10th Mmathematics DAV SA-1 Question paper Download File 10th Sanskrit DAV SA-1 Question paper Download File 10th Science DAV SA-1 Question paper Download File 10th Social_science DAV SA-1 Question paper Download File Std. VIII Practice Paper  2014 Click below the link for details English   Hindi   Marathi  Mathematics   Sanskrit  Science  

Q1. What are the elements of weather? Answer: The elements of weather are humidity, temperature, rainfall, wind speed, etc. Q2. What do you understand by the climate of the place? Answer: The average weather [pattern taken over a long time is called climate of the place. Q3. How are all changes in the weather caused? Answer: All changes in the weather are caused by the sun. Q4. Why does the tropical region have a hot climate? Answer:  It has a hot climate because of its location around the equator. Even in the coldest month the temperature is generally higher than about 15degree C. During the hot  summers, the temperature may cross 40 degrees. Q5. What do you mean by adaptations? Answer: It is the phenomenon of acquiring certain features and habits that ensure better survival in given surroundings. Q6. Why are the animals in the tropical rainforests exhibit variety of adaptations? Answer: The climatic conditions in rainforests are highly suit

CBSE Exam  Congruence of  Triangle Solved Questions Q. 1. Prove that Sum of Two Sides of a triangle is greater than twice the length of median drawn to third side. Given:   Δ ABC in which AD is a median. To prove:   AB + AC > 2AD. Construction:   Produce AD to E, such that AD = DE. Join EC. Proof:   In ΔADB and ΔEDC, AD = DE              (Construction) BD = BD             (D is the mid point of BC) ∠ ADB = ∠ EDC       (Vertically opposite angles) ∴ ΔADB   ≅       ΔEDC   (SAS congruence criterion) ⇒ AB = ED               (CPCT) In ΔAEC, AC + ED > AE           ( Sum of any two sides of a triangles is greater than the third side ) ∴ AC + AB > 2AD      ( AE = AD + DE = AD + AD = 2AD & ED = AB ) Q. 2.  ABC is an isosceles triangle in which AB = AC. Side BA is produced to D such that AD = AB (see the given figure). Show that ∠ BCD is a right angle. In ΔABC, AB = AC