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Hello, I have a math homework I do not understand anything. nitrado The unit of length is the xdsigne cm and a positive number. ABCD is a square with center O and 4x +2 ct. M is the midpoint of ct [CD]. 1) Express in terms of x: the area of the triangle AMB and the area of the triangle AOB. Dvelopper and reduce these expressions. nitrado 2) Dmontrer the party colors (the triangle, AOM + BOM) and the triangle AOB have the same area. Factor the area. 3) What percentage of the area of the square ABCD represents the area of the colored part? Justify. The figure is on this web site: http://img357.imageshack.us/i/sanstitre1mo4.png/ Thanks for your help.
22-02-2010 4:52 p.m. #
Jai LIE 1: a. 8x + 8x + 2 (Once dvelopper nitrado and reduces) b. 4x + 4x + 1 (Once dvelopper and reduces) and 2 I did: a. AMB-AOB = (8x +8 x +2) - (4x +4 x +1) = 8x +8 x 2 - 4x-4x-1 = 4x-4x +1 The area of the color party e is 4x-4x +1 and it is the same area of the triangle AOB is to say 4x-4x +1. b. 4x-4x +1> x (4x-4 +1 / x) <Factor. That and 3 I do not know how.
Did you make a face? Everything is always easier with a figure You have a small error in your sign for equality of the two areas (Altered by the DarckCrystale 22-02-2010 5:39 p.m.) For your 3 tells you your face on a sheet -even, and look at what is the area AOB compared to what you know (knowing that O is the center of the square) You tell me if you still can not see (Altered by the DarckCrystale 22-02 -2010 5:44 p.m.)
22-02-2010 5:45 p.m. #
Re: Connect nitrado the digital and geometry
Le22-02-2010 5:37 p.m., DarckCrystale: For your 3 traces on your face even on your sheet, and look at what is area of AOB versus what you know (knowing that O is the center of the square) You tell me if you still can not see
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Then O is the center of the square, so AOB and DOC = [OM] = 1/2 [AB] you calculate the area of the square ABCD and the area of AOB and you seek the coefficient that transforms the area of AOB in area ABCD (eg if you find 3 there So all three triangle AOC that fit in ABCD and to get the percentage you take is 1/3 and then you multiply by 100: 3 for you get some nearly 33%)
22-02-2010 7:09 p.m. #
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