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Chapter 5 of 15
Flashcards

Co-Ordinate Geometry

Kerala Board · Class 9 · Mathematics

Flashcards for Co-Ordinate Geometry — Kerala Board Class 9 Mathematics. Quick Q&A cards covering key concepts, definitions, and formulas.

45 questions20 flashcards5 concepts
20 Flashcards
Card 1Plotting Points

Plot the point P(4, -3) on a coordinate plane and identify its quadrant.

Answer

Step 1: Start from origin (0,0). Step 2: Move 4 units right along positive X-axis. Step 3: From there, move 3 units down along negative Y-axis direction. Step 4: Mark point P(4, -3). Since x > 0 and y

Card 2Finding Coordinates

Find the coordinates of a point that is 5 units left of Y-axis and 2 units above X-axis.

Answer

Step 1: 5 units left of Y-axis means x-coordinate = -5. Step 2: 2 units above X-axis means y-coordinate = +2. Step 3: Coordinates are (-5, 2). This point lies in Quadrant II since x < 0 and y > 0.

Card 3Origin and Axes

What are the coordinates of the origin and on which axes does it lie?

Answer

Coordinates of origin = (0, 0). The origin lies on both X-axis and Y-axis simultaneously. It is the intersection point of both axes. Distance from both axes is zero, hence both coordinates are zero.

Card 4Quadrant Identification

Identify the quadrant for each point: A(3,5), B(-2,4), C(-1,-3), D(6,-2)

Answer

A(3,5): x > 0, y > 0 → Quadrant I. B(-2,4): x < 0, y > 0 → Quadrant II. C(-1,-3): x < 0, y < 0 → Quadrant III. D(6,-2): x > 0, y < 0 → Quadrant IV. Remember: Q1(+,+), Q2(-,+), Q3(-,-), Q4(+,-)

Card 5Axes Equations

Write the equation of X-axis and Y-axis. Explain why.

Answer

X-axis equation: y = 0. Why? Every point on X-axis has y-coordinate = 0 (no distance from X-axis). Y-axis equation: x = 0. Why? Every point on Y-axis has x-coordinate = 0 (no distance from Y-axis). Ex

Card 6Abscissa and Ordinate

Find the abscissa and ordinate of point Q(-7, 5).

Answer

Step 1: Identify x-coordinate (abscissa) = -7. Step 2: Identify y-coordinate (ordinate) = 5. Remember: In point (x,y), first value is abscissa (x-coordinate), second value is ordinate (y-coordinate).

Card 7Geometric Shapes

Plot points A(2,3), B(2,-1), C(-3,3), D(-3,-1). What shape do they form?

Answer

Step 1: Plot A(2,3) in Q1, B(2,-1) in Q4, C(-3,3) in Q2, D(-3,-1) in Q3. Step 2: Join points in order. Step 3: AB is vertical (same x-coordinate), CD is vertical, AC is horizontal (same y-coordinate),

Card 8Ordered Pairs

Are points (3, -5) and (-5, 3) the same? Explain with plotting.

Answer

No, they are different. Point (3,-5): Move 3 right, 5 down → Quadrant IV. Point (-5,3): Move 5 left, 3 up → Quadrant II. This shows (x,y) ≠ (y,x) when x ≠ y. Coordinates are ordered pairs where sequen

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Frequently Asked Questions

What are the important topics in Co-Ordinate Geometry for Kerala Board Class 9 Mathematics?

Co-Ordinate Geometry covers several key topics that are frequently asked in Kerala Board Class 9 board exams. Focus on the core concepts listed on this page and practise related questions to build confidence.

Start by understanding all key concepts. Practise previous year questions from this chapter. Revise formulas and definitions regularly. Use flashcards for quick revision before the exam.

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Sources & Official References

Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.