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This Geometry Question Will Likely Be On The CXC/CSEC Exams

In the diagram below, not drawn to scale, O indicates the center of the circle. The lines AD and CE are parallel. Angle DAB = 620; angle ACE = 540.  What is the value of angle ECB?


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Feb 12, 2018
Trudy, because an angle inscribed within a semi circle "diameter" is a right angle or 90 degrees. 90 - 54 = 36

Trudy Ann

Feb 11, 2018
how is it 36


Feb 07, 2018
Yes, it is.


Feb 06, 2018


Feb 04, 2018
Fazeena, you are correct. An angle inscribed in a semicircle is always a right angle; opposite angels in parallel lines are equal.


Feb 03, 2018
Is it 36?