This presentation continues with my earlier topics on straight lines, coordinate geometry. Here, we learn how to write the locus os a point satisfying a given equation and also learn how to write the bisector of the angle between 2 lines. Both the acute angled and the obtuse angled bisectors are discussed. This simple video is useful for students of grade 11 studying math.

1. GRADE 11 MATH
STRAIGHT LINES
COORDINATE GEOMETRY

2. Preview
In this section, we discuss locus problems in straight lines
We also discuss bisector of the angle between 2 lines

3. Locus is the path travelled by a moving point when it satisfies certain
conditions

4. Question 1

5. Question 2
Find the locus of a point such that the sum of it’s distances from (0,2) and (0,- 2)
is 6

8. A(5,3), B(3,-2). A point P moves so that A ∆𝑃𝐴𝐵 = 𝑐𝑜𝑛𝑠𝑡𝑎𝑛𝑡
and = 9 square units. Find the equation of the locus of point P
QUESTION 3
Area of a triangle formed by 3 vertices (𝑥1, 𝑦1), 𝑥2, 𝑦2 , 𝑥3, 𝑦3 𝑖𝑠
1
2
𝑥1 𝑦2 − 𝑦3 + 𝑥2 𝑦3 − 𝑦1 + 𝑥3(𝑦1 − 𝑦2)

10. Question 4
A rod of length l slides with its ends on the 2 axes. Find the locus if it’s
midpoint.

13. Question 5

16. Question 6

20. For any further help, contact me on
mathews.suman@gmail.com