Coordinate Geometry — Question Ex 7.2 Q3
Back to all questionsTo conduct Sports Day activities, in your rectangular shaped school ground ABCD, lines have been drawn with chalk powder at a distance of 1 m each. 100 flower pots have been placed at a distance of 1 m from each other along AD, as shown in given
figure below. Niharika runs \(\frac { 1 }{ 4 }\) th the distance AD on the 2nd line and posts a green flag. Preet runs \(\frac { 1 }{ 5 }\) th distance AD on the eighth line and posts a red flag. What is the distance between both the flags? If Rashmi has to post a blue flag exactly halfway between the line segment joining the two flags, where should she post her flag?
The blue flag is in the 5th line, at a distance of 22.5 m.
CBSE Class 10 Coordinate Geometry — Complete Guide
Coordinate Geometry is a formula-based scoring chapter worth 6 marks. All questions are direct formula applications.
Quick Revision: Key Formulae
- Distance: d = √[(x2−x1)² + (y2−y1)²]
- Section: P = [(mx2+nx1)/(m+n), (my2+ny1)/(m+n)]
- Midpoint: M = [(x1+x2)/2, (y1+y2)/2]
- Area: ½|x1(y2−y3) + x2(y3−y1) + x3(y1−y2)|
- Collinear: Area = 0
Most Important Questions
- Find distance between two points
- Find ratio in which a point divides a line segment
- Find area of triangle given vertices
- Prove collinearity using area formula
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