Kit Library

📚 Chapter Learning Kit

Orienting Yourself: The Use of Coordinates · Class 9 Mathematics

English 3 topics 180 leveled MCQs 62 flashcards 4 games Free

Shared by a Veda teacher · Generated with Veda AI · Oct 2026

⚡ Veda Bites

The whole idea, one bite at a time

Veda Bites are swipeable micro-lessons — each one teaches exactly one idea. Here's a taste from this kit; the app has the full deck.

💡 Key Idea

Two numbers locate anything

One number pins a point on a line. How many does a flat surface need?

Fix a starting point and two directions at right angles, and every position on a flat surface is captured by exactly two numbers — no more, no fewer.

↳ A plane is two-dimensional, so it takes exactly two numbers to place a point on it.

📖 Definition

Axes, origin, plane

The two lines everything else is measured from.

↳ Two perpendicular number lines and their crossing point set up the whole system.

⚠️ Common Mistake

The x-coordinate is measured from the y-axis

Almost everyone gets this backwards the first time.

To say how far right a point is, you must measure from the vertical line. So the x-coordinate is the distance from the y-axis, and the y-coordinate is the distance from the x-axis.

↳ Each coordinate is measured from the axis it is not named after.

💡 Key Idea

Hide a right triangle under the segment

Two points sit at a slant. No single subtraction will measure that gap.

Run a horizontal line from one point and a vertical line from the other. They meet, and the three points form a right-angled triangle whose hypotenuse is the segment you want.

↳ Every distance question on the plane is a right-triangle question in disguise.

⭐ Important Fact

Baudhāyana and Pythagoras

The theorem behind the formula has two names for a reason.

The square on the hypotenuse equals the sum of the squares on the other two sides.

↳ The rule that turns two legs into a hypotenuse is what makes the distance formula work.

➗ Formula

The distance formula

One line that measures any gap on the plane.

For $A(x_1, y_1)$ and $B(x_2, y_2)$:

↳ Differences, squares, sum, square root — in that order, every time.

📖 Smart notes

What you'll study, topic by topic

1

The Coordinate Plane

Two perpendicular number lines turn a flat surface into something we can give directions on. This topic sets up the axes, the origin and the four quadrants, shows what each of a point’s two coordinates actually measures,…

~40 min · full explanation, examples & memory tricks in the app

2

The Distance Between Two Points

Any two points on the plane hide a right-angled triangle between them: the horizontal and vertical gaps are its legs and the segment joining them is its hypotenuse. The Baudhayana-Pythagoras theorem then turns those two…

~45 min · full explanation, examples & memory tricks in the app

3

Midpoints, Collinearity and Shapes

Averaging two points gives the exact halfway mark between them, and that one idea opens up the rest of the chapter: finding a missing endpoint, cutting a segment into three, testing whether three points lie on a line, de…

~45 min · full explanation, examples & memory tricks in the app

❓ Leveled MCQ practice

Try the smart MCQs from this kit

180 questions laddered from warm-up to topper-level, each with an explanation. A taste:

Two points $(-2, 5)$ and $(6, 5)$ are marked on a plane. How many units apart are they?

Beginner
A 4 units B 3 units C 8 units D 11 units
Show answer & explanation

8 units

They share $y = 5$, so the gap is $|6 - (-2)| = |6 + 2| = 8$.

The points $(3, -7)$ and $(3, 4)$ lie on one vertical line. What is the distance between them?

Beginner
A 11 units B 3 units C 7 units D 28 units
Show answer & explanation

11 units

Same x-coordinate, so the gap is $|4 - (-7)| = 11$.

How far apart are $(-5, -2)$ and $(-5, -9)$?

Beginner
A 11 units B 5 units C 14 units D 7 units
Show answer & explanation

7 units

$|-9 - (-2)| = |-9 + 2| = |-7| = 7$.

What is the distance of the point $(0, -6)$ from the origin?

Beginner
A 0 units B 12 units C 36 units D 6 units
Show answer & explanation

6 units

It sits on the y-axis, so the distance is $|-6 - 0| = 6$.

🃏 Flashcards

Tap a card to flip it

62 flashcards in this kit — the app reviews them with spaced repetition so the right card returns on the right day.

🎮 Learning games

Play your way through this kit

Every game is built from this kit's own content — scores feed your mastery, so playing counts as studying.

Word Match True False Fill Blank Word Scramble Playable in the app

Study it properly — free, in the app

The full Veda Bites deck, complete notes, spaced-repetition flashcards, leveled MCQs, tests and games for this kit — plus Daily Facts and the Arena, every day.