The exterior angle of a triangle is equal to the sum of two ________.

(a)

Exterior angles

(b)

Interior opposite angles

(c)

Alternate angles

(d)

Interior angles

ABCD is a square, diagonals AC and BD meet at O. The number of pairs of congruent triangles with vertex O are ________.

(a)

6

(b)

8

(c)

4

(d)

12

The correct statement out of the following is ________.

(a)

ΔABC ≅ ΔDEF

(b)

ΔABC ≅ ΔDEF

(c)

ΔABC ≅ ΔFDE

(d)

ΔABC ≅ ΔFED

If bisectors of ∠A and ∠B of a quadrilateral ABCD meet at O, then ∠AOB is ________.

(a)

∠C + ∠D

(b)

\(\frac { 1 }{ 2 } (\angle C+\angle D)\)

(c)

\(\frac { 1 }{ 2 } \angle C+\frac { 1 }{ 3 } \angle D\)

(d)

\(\frac { 1 }{ 3 } \angle C+\frac { 1 }{ 2 } \angle D\).

Which of the following statement is correct?

(a)

Opposite angles of a parallelogram are not equal.

(b)

Adjacent angles of a parallelogram are complementary.

(c)

Diagonals of a parallelogram are always equal.

(d)

Both pairs of opposite sides of a parallelogram are always equal.

The point of concurrency of the medians of a triangle is known as __________

(a)

circumcentre

(b)

incentre

(c)

orthocentre

(d)

centroid

If the length of a chord decreases, then its distance from the centre__________

(a)

Increases

(b)

decreases

(c)

same

(d)

cannot say

The angle subtend by a semicircle at the remaining part of the circumference is___________

(a)

60^o

(b)

90^o

(c)

120^o

(d)

180°

If sum of two opposite angles of a cyclic quadrilateral is_________

(a)

45°

(b)

90°

(c)

180°

(d)

360°

The perpendicular line from the centre of the circle to the chord divided the chord in the ratio________

(a)

1: 1

(b)

1: 2

(c)

2: 1

(d)

1: 3