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# Mathematics Geometric Lecture

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### Transcript

• 1. MATHEMATICS LECTURE 19TH MARCH 2014
• 2. VOLUME OF CONE
• 3. FORMULA OF CONE V=πr2 h/3
• 4. EXAMPLE
• 5. QUESTION 1
• 6. what is the volume of this cone? ( π=3.142)
• 7. QUESTION 2
• 8. Given a cone with the height of 10cm and the diameter of the circle is 18cm. Find the volume of this cone. Take π as 3.142.
• 9. SURFACE AREA OF CONE
• 10. A=πr(r+√h2+r2) A=AREA r=RADIUS h=HEIGHT
• 11. SURFACE AREA OF TRAPEZOID
• 12. FORMULA OF TRAPEZOID h (𝑎+𝑏) 2 = 𝑇𝑆𝐴 H= height (a+b) = total length of parallel sides