### Arithmatic Questions For SSC Competitive Exams

An angle is the union of two non-collinear rays with a common initial point.

l) An angle whose measure is 90° is a right angle.

2) An angle whose measure is less than 90° is called an acute angle.

3) An angle whose measure is more than 90° is called an obtuse angle.

4) An angle whose measure is l80° is called an straight angle.

5) An angle whose measure is more than l80° is called a reflex angle.

6) The sum of all the angles around a point is equal to 360°.

**Complementary Angles: **Two angles, the sum of whose measure is 90° are called complementary angles

**Supplementary Angles**: Two angles, the sum of whose measure is l80° are called supplementary angles Transversal: A line which intersects two or more lines at distinct points is called a transversal ofthe given line. Angles made by a transversal with

ln the above figure AB and CD are two lines and QR is the transversal. Corresponding angles: Two angles on the same side of` a transversal are known as the corresponding angles if` both lie either above two lines or below the two lines.

Ll = L5, L2= L6, L3= L7 and

L4= L8

Alternate Interior Angles: ln the above figure L3 and L5 and L4 and L6 are alternate interior angles and are equal.

i.e. L3 =L5 and L4= L6

PROBLEMS

l. What is the angle which equals one-fifih of` its supplement?

a) l5° b) 30°

c) 36° d) 75°

Answer: b

Let angle be tita,

The angle is one-fifth of`its

supplement. 4

Supplement is 5 times of` the angle

Supplementary angle = 5tita

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