1. ABCD is a square. If AB=(3x-1)cm and BD=(x+5)cm
(a) find the value of x,
(b) find the length of AB,
(c) find the area of the square ABCD.
2. The sum of the interior angles of an n-sided polygon is given as
S=(n-2)x180度
If each of angles is y=10度
(a) Fild the sum of the interior angles of a regular pentagon.
(b) Find the value of y in the following regular pentagon.
3. The monthly salary of Mr. Chan is $P. He spends $Q each month and
saves the rest. At the end of the year. he has to pay $7000 as salary tax.
(a) How much does he save each year after paying the tax?
(b) If p=9000 and q=7000, what is the amount of his yearly saving