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Angle ACB = 54.  What is the size of angle CAB?

 

 Mar 25, 2021
 #1
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A triangle in a circle that way, always must be a right triangle, so b  must be 90. 

The sum of angles in a triangle are 180. 

C = 54

B = 90

A + B + C = 180

A + 90 + 54 = 180

 

Can you solve for A?

 

=^._.^=

 Mar 25, 2021
 #2
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angle c = 54 and intercepts 108 degrees of arc

   the remaining 72 degrees of arc of the semi-circle are intercepted by inscribed angle A

      angle A = 1/2 * 72 = 36 degrees

 Mar 25, 2021

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