If the angles of a right triangle are in an arithmetic sequence,find them by making suitable equations.

The angles of a quadrilateral are in an arithmetic sequence. The largest angle is 150^@ . Find other angles.

The angles of a pentagon are in arithmetic sequence. Prove that its smallest angle is greater than 36^@ .

If 3/2, 5/3, 11/6 are the first three terms of an arithmetic sequence, find the first integer term in this sequence.

Find all angles of triangle AOP and OPT.

The angle of a right triangle is 30^@ and its hypotenuse is 4cm. What is its area?

For the arithmetic sequence 6,12,18. Find the 10^(th) term?

The angles in a 9 sided polygon are in arithmetic sequence. Is 100^o the smallest angle of the polygon? - Justify your answer.

The sum of first n terms of an arithmetic sequence is n^2+2n Find the common difference.

Observe the number pattern made using terms of an arithmetic sequence 2, 6,10, ... . Find the first and the last numbers in the 20th line.