Class 10th mathematics(Triangles)

-
Notes for Triangles
Basic Concepts with Examples
•    SIMILAR TRIANGLES. Two triangles are said to be similar if
       (i)   their corresponding angles are equal and
       (ii)  their corresponding sides are proportional.
•    All congurent triangles are similar but the similar triangles need not be congruent.
•    Two polygons of the same numbers of sides are similar, if
       (i)   their corresponding angles are equal and
       (ii)  their corresponding sides are in the same ratio.
•    BASIC PROPORTIONALITY THEOREM. In a triangle, a line drawn parallel to one side, to intersect the other sides in distinct points, divides the two sides in the same ratio.
•    CONVERSE OF BASIC PROPORTIONALITY THEOREM. If a line divides any two sides of a triangle in the same ratio, the line must be parallel to the third side.

Comments

Post a Comment

Popular posts from this blog

Class 11th science chemistry (thermodynamics)

-
Image
Thermodynamics deals with the change of energy in physical and chemical processes. It allows us to study these changes quantitatively as well as to make effective predictions. Therefore, we divide the universe as surrounding and system. Physical or chemical processes lead to progression or immersion of heat part of it may be converted to work. According to the first law of thermodynamics , these quantities are related as ∆U = q + w where q is heat and w is work. Change in internal energy is a state function and depends on only the initial and final states. On the other hand, w and q are not state functions. The change in temperature due to the transfer of heat one system to another system can be measured. Heat evolved or absorbed is expressed as q = C∆T. In case of expansion of gas, work is measured as w = –p ex ∆V Enthalpy Change Enthalpy change is defined as the change in energy of a system at constant pressure. It is denoted as ΔH. Enthalpy is a state function. Enthalpy ch...
Read more

Class 11th science physics(thermodynamics)

-
Image
What is Thermodynamics? Thermodynamics is concerned with the relationship between other forms of energy and heat. It explains how thermal energy is converted from other forms of energy. The energy coming from heat is termed thermal energy. When the tiny particles within an object move, they generate heat, more amount of heat is generated, when these particles move at a faster pace. What are the Laws of Thermodynamics? The laws of thermodynamics define the fundamental physical quantities like energy, temperature, and entropy that characterize thermodynamic systems at thermal equilibrium. The four laws of thermodynamics are: Zeroth Law : It states that when two systems are in thermal equilibrium with the third system which is separate, the whole system together is said to be in equilibrium with one another. First Law:  It states the law of conservation of energy when applied to a system in which the energy transfer occurs from or towards the system (with the help of h...
Read more