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If the sides of a convex polygon are produced, in order, the sum of the exterior angles is 4 right angle..

In a polygon of 'n' sides, the sum of the interior angles is equal to (2n - 4) right angles. Each interior angle of a regular polygon is If the sides of a convex polygon are produced, in order, the sum of the exterior angles is 4 right angles. Each exterior angle of..

If two sides of a triangle are unequal, then the greater angle is opposite to the greater side. If two angles of a triangle are unequal, the greater side is opposite to the greater angle. Of all the line segments that can be drawn to a given straight line from a point outside it, the perpendicu..

A matrix is a rectangular array of numbers, arranged in rows and columns. Order of a matrix = Number of rows in it x Number of columns in it Row matrix is a matrix with only one row. Column matrix is a matrix with only one column. Zero or Null matrix is a matrix in which every element..

WAVE is a form of disturbance, which travels through a material medium due to the repeated periodic motion of the particles of the medium about their position. Mechanical wave is a periodic disturbance, which requires a material medium for its propagation. Electromagnetic wave is a disturba..

Science is the way by which a person gets at the truth or at least as close to truth as possible. The basis of science is its orderly stepwise procedure - the scientific method. Scientific method employs various procedures such as, accurate observation, asking questions about the observatio..

Mendeleev was able to predict the existence of undiscovered elements like Ga, Sc and Ge Mendeleev corrected the atomic masses of a few elements on the basis of their positions in the periodic table Mendeleev's table could not assign a proper position to hydrogen or to the lanthanides and ..

>Mendeleev was able to predict the existence of undiscovered elements like Ga, Sc and Ge. Mendeleev corrected the atomic masses of a few elements on the basis of their positions in the periodic table. Mendeleev's table could not assign a proper position to hydrogen or to the lanthanides and actinid..

= N i A and the and the direction of m is given by the right-hand thumb rule: curl the palm of your right hand along the loop with the fingers pointing in the direction of the current. The thumb sticking out gives the direction of m (and A). When this loop is placed in a uniform..

>The circumcentre of a triangle is the point of concurrence of the right bisectors of the sides of the triangle. The length of perpendicular of the point (x 1 ,y 1 ) from the straight line ax + by + c = 0 is equal to A set of lines satisfying a given condition is called a family of lines...