GEOMETRY

In a right angled triangle, the square on the is equal to the sum of the squares on the other two sides.

If in a triangle, the square on the greatest side is equal to the sum of squares on the other two sides, then the triangle is triangle.

Th ere are special sets of numbers a, b and c that makes the Pythagorean relationship true and these sets of special numbers are called Pythagorean

If an altitude is drawn to the hypotenuse of an right angled triangle, then the two triangles are to the given triangle and also to each other.

If ' ' l and ‘m’ are the legs and n is the of a right angled triangle
then,

l^{2} = n^{2} - m^{2}

Trapezium is a quadrilateral in which a pair of opposite sides are

Based on the nature of sides and angles of a , it gets special names like trapezium, parallelogram, rhombus,rectangle, square and kite.

If the non-parallel sides of a trapezium are equal in length and form equal angles at one of its bases, then it is called an trapezium.

To construct a trapezium, measurements are enough

In an isosceles trapezium, the non-parallel sides are in length.

A parallelogram is a quadrilateral in which the sides are parallel.

independent measurements are enough to construct a parallelogram.

In a parallelogram, the opposite sides are and

Diagonals of a parallelogram each other.

GEOMETRY

Gap-fill exercise