The sum of an interior angles of a regular polygon is 30 right angles. How many sides has the polygon?

• A. 34 sides
• B. 30 sides
• C. 26 sides
• D. 17 sides

Factorize x²âˆ’2x−15

• A. (x + 3)²
• B. (x + 5)(x − 3)
• C. (x − 5)²
• D. (x − 5)(x + 3)

The points on a linear graph are as shown in the table. Find the gradient (slope) of the line.

• A. 2\(\frac{1}{2}\)
• B. 2
• C. 1
• D. \(\frac{1}{2}\)

(a) Using a ruler and a pair of compasses only, construc :

(i) a triangle PQR such that /PQ/ = 10 cm, /QR/ = 7 cm and < PQR = 90° ; (ii) the locus \(l_{1}\) of points equidistant from Q and R ; (iii) the locus \(l_{2}\) of points equidistant from P and Q.

(b) Locate the point O equidistant from P, Q and R.

(c) With O as centre, draw the circumcircle of the triangle PQR.

(d) Measure the radius of the circumcircle.