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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?
Comments
Angelica
Apr 14, 202090-54 is 36
neal
Feb 12, 2018Trudy, because an angle inscribed within a semi circle "diameter" is a right angle or 90 degrees. 90 - 54 = 36
Trudy Ann
Feb 11, 2018how is it 36
neal
Feb 07, 2018Yes, it is.
Alesha
Feb 06, 201836
neal
Feb 04, 2018Fazeena, you are correct. An angle inscribed in a semicircle is always a right angle; opposite angels in parallel lines are equal.
Fazeena
Feb 03, 2018Is it 36?