Maths

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14 Terms

1
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Gradient formula between (x₁,y₁) and (x₂,y₂)?

m = (y₂ − y₁) / (x₂ − x₁) ✅

2
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Area of circle?

πr² 

3
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Sum exterior angles of any polygon?

360° 

4
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Sum interior angles of n‑sided polygon?

(n − 2) × 180° 

5
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Histogram: frequency = ?

frequency density × class width 

6
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If y ∝ 1/x what is the formula?

y = k / x 

7
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If y ∝ x what is the formula?

y = k x (k = constant) 

8
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Volume of a cuboid?

volume = length × width × height 

9
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Surface area of a cuboid?

2(lw + lh + wh) 

10
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Volume of any prism?

volume = cross‑sectional area × length 

11
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Volume of a cylinder?

volume = π r² h 

12
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Curved surface area of a cylinder?

2 π r h 

13
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Total surface area of a cylinder?

2πr h + 2π r² 

14
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