131-malekpour-07faex01

131-malekpour-07faex01 - NIATH 131 ' OCTOBER 26, 2007...

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Unformatted text preview: NIATH 131 ' OCTOBER 26, 2007 SHIRIN NIALEKPOUR EXAM I Name: I 25 Points I H ‘ 20 Points A II I 10 Points ,—————-————~——————$———-——— IV '20 Points ___I_# V 95 Points _‘___1__ Total 100 Points YOU NEED TO SHOW WORK TO GET FULL CREDIT. 93.: B 5? I. (25 points.) 1. The following is a rhombue and one of its diagonals. Show that AD is the angle bisector of ABAC. B D 2. Using a. straight edge and a. compass draw the angle bisector of 1A. Describe youiisteps and explain Why does your method produce the required angle bisector. IO Name: II. ('20 points.) John is asked to find the sum of the interior angles of a Hexagon. He uses the following picture and argument. Is he correct or not? W by? If not, correct his logic. John wrote: There are 6 triangles making up the Hexagon. Each triangle gives 180°, therefore 6 x 180° 2 1080‘” is the sum of the interior angle of a Hexagon. 3\ Name: III. (10 points.) W hat. 3D object will you get fi‘Om folding the following net and glueing along the same named edges"? - N ame: IV. (20 points.) Imagine the following pattem is extended in both directions forever. Identify all of its symmetries? V 4 l / l k L 7 W l l/ A V Nam 62 W V. ('25 points.) Consider the foilowing figure. 11. is given that DE BC and AB is 3 cm;. What is the measure of LADE and length of AD? Justify. ...
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131-malekpour-07faex01 - NIATH 131 ' OCTOBER 26, 2007...

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