S4_3_Alegbraic_Subject_Formulae_Ch4

S4_3_Alegbraic_Subject_Formulae_Ch4 - www.mathsrevision.com

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Unformatted text preview: www.mathsrevision.com www.mathsrevision.com www.mathsrevision.com Formulae www.mathsrevision.com Change the Subject of Formula Harder Subject of Formula Understanding Formulae Making Formulae Using Formulae S4 Credit www.mathsrevision.com www.mathsrevision.com www.mathsrevision.com Starter Questions Starter Questions 1. Does 3 + 2 x 4 = 11 or 20 2 1 2 . Calc ulat e of 6 2 ( 29 3 . T r ue or f als e I f a = 9 and b = - 3 b b - a = 4 a S4 Credit www.mathsrevision.com www.mathsrevision.com www.mathsrevision.com www.mathsrevision.com Learning Intention Learning Intention Success Criteria Success Criteria 1. To explain how to evaluate formulae 1. 1. Understand the term Understand the term formulae. formulae. Formulae 2. 2. Be able to substitute values into Be able to substitute values into formulae and evaluate properly using formulae and evaluate properly using BODMAS. BODMAS. S4 Credit www.mathsrevision.com Formulae A formula is the process calculating a quantity based on a known relationship e.g. Length, Area, Volume etc........ It is VERY important that we remember a keypoint when working with formulae. B O D M A S Brackets Other squares and square root etc.... Divide Multiplication Addition Subtraction S4 Credit www.mathsrevision.com Formula for Parallelogram Example 1 : Find the area of parallelogram. Parallelogram Area b h = Area = 9 3 2 Area = 27cm 9cm 3cm S4 Credit 1 r = radius = D 2 3 3 4 Volume = (10) =4187cm ( to 4 sig. f igs) 3 3 4 Volume = r 3 Formulae for the Volume of a Sphere www.mathsrevision.com S4 Credit r D D = diameter Q. If the above sphere has radius 10cm. Calculate its volume. Q. If the above cone has radius 15cm and height of 10 cm. Calculate its volume. Formulae for Volume of a Cone h = Perpendicular height 2 3 1 Volume = (15) 10 = 2355cm 3 r = radius www.mathsrevision.com r h 2 1 Volume Cone = r h 3 S4 Credit www.mathsrevision.com Now try MIA Ex 2.1 & 2.2 Ch4 (page 80) Formulae S4 Credit www.mathsrevision.com Starter Starter Q1. Calculate the volume of the following sphere. Q2. Car depreciates 10% each year. What is it' s value after 3 years if it' s initial value was 3,000. www.mathsrevision.com D = 6 cm r D 4 3 Volume = r 3 4 3 = (3) 3 3 = 36cm S4 Credit www.mathsrevision.com www.mathsrevision.com www.mathsrevision.com www.mathsrevision.com Learning Intention Learning Intention Success Criteria Success Criteria 1. To explain how to construct a formula. 1....
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This note was uploaded on 02/13/2012 for the course MAT 1117 MAT 117 taught by Professor White during the Spring '09 term at University of Phoenix.

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S4_3_Alegbraic_Subject_Formulae_Ch4 - www.mathsrevision.com

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