3s 4 19 answer

Theorem 3 (S.S.S.) Similarity - If three pairs of corresponding sides are proportional then the two triangles are similar. In D ABC and D PQR, D ABC ~ D PQR The above three theorems are without proof. Such theorems can be called postulates. Now, let us compare similar triangles ..

Question: Four elements along a period have atomic number (11, 13, 16 and 17). The most metallic among these has an atomic number of __________. 1. 11 2. 12 3. 16 4. 17 Answer: ..

Question: What is the angle between the incident and reflected rays when a ray of light is incident normally on a plane mirror? 1. 90 o 2. 45 o 3. 180 o 4. 0 Answer: 4..

Question: The lid of the solar cooker is made up of ______. 1. plastic sheet 2. black sheet 3. plane mirror 4. glass Answer: 4..

Question: An example for a vector quantity is __________ 1. speed 2. momentum 3. distance 4. length Answer: ..

Question: In the mouth the food is formed into __________. 1. chyme 2. chyle 3. bolus 4. pellets Answer: 3..

Question: In platyhelminthes, the excretory organs are 1. nephridia 2. malpighian tubules 3. flame cells (solenocytes) 4. green glands Answer: 3..

Question: SI unit of weight is ______. 1. newton 2. kg 3. Wt 4. kg.wt Answer: ..

Question: Fractional crystallization is used to separate which of the following? 1. Two solids 2. Two liquids 3. Two gases 4. A solid and a liquid Answer: ..

Question: The method of detecting the presence, position and direction of motion of distant objects by reflecting a beam of sound waves is known as _____. 1. RADAR 2. SONAR 3. MIR 4. CRO Answer: ..