Congruence of Triangles and Inequalities in a Triangle — Maths STD 9 — Question

Fill in the blanks to make the following statements true:
A triangles cannot have more than ______ obtuse angles.

Fill in the blanks in the following so that the following statements is true.
Sides opposite to equal angles of a triangle are ____________.

Fill in the blanks:
A continuous piece of a circle is _________ of the circle.

Fill in the blank in the following to make the statement true:
If two parallel lines are intersected by a transversal, then each pair of corresponding angles are ______.

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).

Fill in the blanks:
Circle having the same centre and different radii are called _________ circles.

Fill in the blank in the following to make the statement true:
Two lines parallel to the same line are __________ to each other.

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.

The complement of an acute angle is _______ .