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​ Quadrilateral ABCD ​ is inscribed in this circle.

What is the measure of  ∠A ?

 Mar 23, 2018

Best Answer 

 #1
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OPPOSITE angles of a cyclic quadrilateral ( a quadrilateral with all vertices on the circumference of a given circle) add to 180 degrees    so A = 180 - 43 = 137 degrees

 Mar 23, 2018
 #1
avatar+18331 
+3
Best Answer

OPPOSITE angles of a cyclic quadrilateral ( a quadrilateral with all vertices on the circumference of a given circle) add to 180 degrees    so A = 180 - 43 = 137 degrees

ElectricPavlov Mar 23, 2018

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