Congruent Triangles — Maths STD 9 — Question

Complete the following statements by means of one of those given in brackets against each:
If one pair of opposite sides are equal and parallel, then the figure is _____________. (parallelogram, rectangle, trapezium).

The decimal representation of a rational number is either _______ or ________.

In an isosceles triangle ABC with AB = AC, if BD and CE are its altitudes, then BD is ________ CE.

Fill in the blank so as to make the following statements true:A ray stands on a line, then the sum of the two adjacent angles so formed is ______.

Fill in the blanks so as to make the following statements true:
Given a line and a point, not on the line, there is one and only______ line which passes through the given point and is______ to the given line.

Fill in the blanks to make the following statements correct:
The triangle formed by joining the mid-points of the sides of a right triangle is ____________.

Fill in the blanks to make the following statements correct:
The figure formed by joining the mid-points of consecutive sides of a quadrilateral is ____________.

Fill in the blanks so as to make the following statements true:
Two distinct _______ in a plane cannot have more than one point in common.

Fill in the blanks with < or >.
(Sum of any two sides of a triangle) (twice the median to the 3rd side).