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Question Number 46906 by behi83417@gmail.com last updated on 02/Nov/18

Commented by behi83417@gmail.com last updated on 03/Nov/18

$$inA\stackrel{△}{BC}:(a,b,c,assides)$$$$D:midpointofAC,$$$$BE:bisectof\measuredangle B,and\measuredangle {DBD}^{\prime }.$$$$\mathit{w}\mathit{a}\mathit{n}\mathit{t}\mathit{e}\mathit{d}:$$$$1.{\mathbf{BD}}^{\prime }\mathrm{\&}{\mathbf{DD}}^{\prime },intermsof:a,b,c.$$$$2.anglebetween:\mathbf{AC}\mathrm{\&}\mathbf{IK}.$$$$3.whenangleof\mathbf{AC}\mathrm{\&}\mathbf{IK},equales$$$$to:{30}^{\bullet },then:\measuredangle \mathbf{B}=?$$$$4.calculate\measuredangle \mathbf{B},if:\mathbf{AC}\parallel \mathbf{IK}.$$

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