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1) Let ABCDE be a regular pentagon. Prove that AC bisects angle BCE and AD bisects angle BDE.

2) In quadrilateral BCDE, CBD = 31 degrees, CED = 47 degrees, BCE = 85 degrees. Find angle BDE.

 Jun 19, 2021
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It would be easier for us if you'd enclose a diagram with question especially geometry. Anyway, 

 

2) ∠BDE + ∠CBD  + ∠CED + ∠BCE = 360 

    ∠BDE + 31 + 47 + 85 = 360 

     ∠BDE = 360 - 163 = 197°

 Jun 19, 2021

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