C is a mid-point of AB B. RD Sharma solutions for Class 12 Maths chapter 23 (Algebra of Vectors) include all questions with solution and detail explanation. Therefore AC = 3^0.5 N. AD will be resultant of AC and CD forces. Get Free Answers For 'If ABCDEF is a regular hexagon then prove that ab ac ad ea fa=4ab' and Find Questions at Inboz 12 Let ABCDEF be a regular hexagon and put a AB b BC Find vector expressions in from MATH 1002 at The University of Sydney Draw a circle of radius 3 cm. 3. Now forces 4,5,6 are actiong symmetrically in opposite direction on AD. 13. Central angle will be divided into 6 equal angles. Each interior angle of a regular polygon = 168° Let number of sides = n, then × 90° = 168° â´ 30n â 60 = 28n â 30n â 28n = 60 â 2n = 60 â n = = 30 â´ Number of sides of the polygon = 30. Let midpoint of BF be O. BO = AB (cos 30) BF = 2 x BO = 2AB (cos 30) Let midpoint of CE be P Jan 03, 2021 - Maths Formula Chart JEE Notes | EduRev is made by best teachers of JEE. Express 2 a-3 b in terms of u and v, and simplify, when a = u + v, b = 3 u-2 v. 12. Question 10. 22. , then find A + A'and AA' â5 3 5. 21. Prove that r 2R Then their resultant is Let ABCDEF be a regular hexagon.If AD=xBC and CF=yAB, then xy= ? As, AD = 2BC {Properties of a regular hexagon, also AD || BC (Parallel)} Putting in equation (i), Option(C)is the answer. Let ABCbe a triangle with sides a, b, c, inradius rand circumradius R(using the conventional notation). Let ABCDEF be regular hexagon.Then $\\overline{AB} +\\overline{AC}+\\overline{AD}+\\overline{EA}+\\overline{FA} =?$ my answer is $3\\overline{AB}$ but â¦ The formula for the number of vertices in a polygon is: where . If their resultant passes through C on AB, then A. Mark the correct alternative in each of the following: Forces act along OA and OB. The detailed, step-by-step solutions will help you understand the concepts better and clear your confusions, if any. This will clear students doubts about any question and improve application skills while preparing for board exams. A concave polygon is a polygon in which atleast one interior angle is more than 180°. ñªëÅ]î¦ô¢Ù 18 èâ¦Å¡úÙñô¢ª 2019 email: help@eenadupratibha.net 7 Marks Questions 1. Interior angle of hexagon - 120 degrees, so angle ABF- 30 degrees. The measure of each exterior angle of a regular polygon of n To describe this structure consider a two-dimensional array of equilater triangles (or regular hexagons including their centers) of edge a, as indicated in Fig. If A = (1, 2, 1), B = (4, 0, 3), C = (1, 2, 1) and D = (2, 4, 5) then find the short- Then AD;BE;and CFare concurrent if and only if BD CD CE AE AF BF = 1. Since it's a regular hexagon, AB = AF, and by symmetry, AC = AE, so . The measure of each interior angle of a regular polygon of n (n - 2)180 sides is Theorem 117. Stack Exchange network consists of 176 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share â¦ This preview shows page 3 - 4 out of 4 pages.. 11. Or DA = 3.42N. Geometry Theorem 116.