# mathametics syllabus d !!!

#### darknight_007

can any1 brief me on the followin topics, how can i approach 2 these topics????

1) locus..loci
2) histograms..
3) vectors...
4) probability :?

#### Arshiful

go through the chapters help..new syllabus book 4 and try doing the exersice........

#### iFuz

go through past papers......................................

#### darknight_007

i told 2 "brief" me i.e explain me da followin topics!!!!

#### hassam

locus is simply the path traced out by an object.you need to knw 4 things abt this chapter.
1.the locus of point which is at distance d from the point is a circle which is of radius d.
Remember: the easiest way to draw this locus around a set point is to use a compass.

2.the locus of a point which is always at distance d from the line segment PQ is two parallel lines above and below which are at distance d from the line segment such that P and Q are fixed points at either end of the line, so we draw semicircles of radius d.

3.the locus of a point which is EQUIDISTANT frm two intersecting line is the angle bisector of the angle formed b/w two lines,

4.The locus of a point which moves so that it is an equal distance from two points, A and B, is the perpendicular bisector of the line joining A and B.
Perpendicular means at right angles to.Bisector means cuts in half.

http://www.bbc.co.uk/schools/gcsebitesi ... rev1.shtml
check out how to draw angle bisector and perpendicular bisector.
shading is easy.revise from book how to draw triangles.

HISTOGRAMS
its all about dealing with class width.its like a baar graph but we dont have spaces b/w the bars.In histograms the area of bars give the frequency but if all the class intervals are same then the logic of bar graph is applied i.e height of bars is used to denote the frequency.

FREQUENCY=FQ.DENSITY*CLASS WIDTH!

http://www.revisioncentre.co.uk/gcse/ma ... grams.html
YOU CAN SEE AN EXAMOLE ON THE ABOVE LINK

http://www.bbc.co.uk/schools/gcsebitesi ... rev3.shtml