Circles — Maths STD 9 — Question

If altitudes CE and BF of a triangle ABC are equal, then AB = _______.

Fill in the blanks with elements of that set.
U = {1, 3, 5, 8, 9, 10, 11, 12, 13, 15}
A = {1,11, 13}
B = {8,5, 10, 11, 15}
A’ = { }
B’ = { }
A ∩ B = { }
A’ ∩ B’ = { }
A ∪ B = { }
A’ ∪ B’= { }
(A ∩ B)’ = { }
(A ∪ B)’ = { }
Verify: (A ∩ B)’ = A’ u B’, (A u B)’ = A’ ∩ B’

Complete the following statements by means of one of those given in brackets against each:
A line drawn from the mid-point of one side of a triangle _____________ another side intersects the third side at its mid-point. (perpendicular to parallel to, to meet).

Complete the following statements by means of one of those given in brackets against each:
If in a quadrilateral only one pair of opposite sides are parallel, the quadrilateral is _____________. (square, rectangle, trapezium).

Fill in the blanks with < or >.
(Sum of any two sides of a triangle) (the third side)

Fill in the blanks to make the following statements true.
In a right triangle the hypotenuse is the ___ side.

Fill in the blanks:
Segment of a circle is a region between an arc and _________ of the circle.

Fill in the blanks:
All points lying inside/outside a circle are called ________ points/ _________ points.

Fill in the blanks so as to make the following statements true:
Two distinct points in a plane determine a _______ line.