KSSM ADDMATH F4 CHAPTER 7 (7.3 & 7.4)

Find the area of the following triangle by given coordinates of each vertex

P(-4,6), Q(-9,-3) & R(2,-2)

Find the area of the following quadrilateral by given coordinates of each vertex

P(6,2), Q(5,4), R(2,6) & S(-2,0)

Find the area of the following polygon by given coordinates of each vertex

A(2,-1), B(4,3), C(8,10), D(9,6) & E(6,1)

Find the equation of the locus of a moving point P(x,y) such that its distance from the fixed point A is a constant.

A(3,1) ; AP=5 units

(tips to key in your answer: $x^2+y^2+3x+4y=5$ equal to x2+y2+3x+4y=5 without space)

Find the equation of the locus of a moving point P(x,y) that satisfies the given condition.

Given the points A(2,0) and B(2,8). Point P moves that PA:PB=1:3

(tips to key in your answer:  $x^2+y^2+3x+4y+5=0$  equal to x2+y2+3x+4y+5=0 without space)

Find the possible values of k.

A(-2,-1), B(1,3), C(3,k)
Area of triangle  $ABC=10unit^2$  

•  $k=\frac{37}{3}\ or\ k=-1$  

•  $k=-\frac{37}{3}\ or\ k=1$  

•  $k=\frac{3}{37}\ or\ k=-1$  

•  $k=-\frac{3}{37}\ or\ k=1$