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7 votes
7 votes
In the diagram of rectangle ABCD,M

User JSelser
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1 Answer

12 votes
12 votes

If CFE =144 degrees

then BFE = 180 -144 =36 degrees (sum of angles on a straight line)

CEF = 36 Degrees ( alternate angles) or

CEF = 360 - (90+90+144) = 36 ( sum of angles in quadrilateral CDEF)

If ABE = 30 degrees, then EBF = 90 - 30 = 60 Degrees ( angles at the edge of a triangle is 90 degrees)

In triangle BEF, = 60 + 36 + < BEF = 180

User Rastaban
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