Class 9 Maths Chapter 1 Exercise 1.2 Solutions – Coordinates (New NCERT 2026)

Class 9 Maths Chapter 1 Exercise 1.2 Solutions are explained step-by-step based on NCERT Ganita Manjari (2026). This exercise helps students understand coordinate geometry through real-life room planning problems.

Q1 Study Table Placement

Given: A(8,9), B(11,9), C(11,7)

(i) Fourth foot:

Rectangle ⇒ missing point = (8,7)

(ii) Position: ✔ Good position (no obstruction)

(iii) Dimensions:

• Width = 3 units
• Length = 2 units
• Height = Not known

Q2 Bathroom Door & Wardrobe

Door opens near y-axis, wardrobe is far → no intersection

💡 Concept: Position comparison using coordinates

Q3 Bathroom Analysis

(i) Coordinates:

O(0,0), F(0,10), R(-6,10), P(-6,0)

(ii) Shape: Rectangle

(iii) Placement:

• Washbasin: (-6,0), (-3,0), (-3,2), (-6,2)
• Toilet: (-3,2), (-1,2), (-1,5), (-3,5)

Q4 Dining Room

(i) Coordinates:

(-6,0), (12,0), (12,15), (-6,15)

(ii) Table at centre:

Centre = (3,7.5)

Table corners:

• (0.5,6)
• (5.5,6)
• (5.5,9)
• (0.5,9)

👉 Maths Coaching in Ankur Vihar

🧠 Summary

• Coordinates help in real-life planning
• Rectangle properties used frequently
• Midpoint concept important

❓ FAQ

Q1. How to find missing coordinate?
Use rectangle property: match x and y values.

Q2. How to find centre?
Use midpoint formula.