2. Which of the following could not be the lengths of the sides of a right angled triangle?
Select ALL such sets.
3, 4, 5
5, 12, 13
8, 15, 17
12, 15, 18
9, 12, 15
12, 16, 20
10, 24, 25
3. Two equal circles are cut out of a rectangle of card of dimensions 16 by 8. The circles have the maximum diameter possible. What is the approximate area of the paper remaining after the circles have been cut out?
104
78
54
27
13
6. ASB is a quarter circle. PQRS is a rectangle with sides PQ = 8 and PS = 6. What is the length of the arc AQB ?
5π
10π
25
14
28
9. A and B are equidistant from the line l. How many circles can be drawn with their centres on line l and that pass through both A and B?