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2015-01-02T12:32:58+05:30

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The diagonal of a rectangle are equal and bisect each other which => OA = OD => angle OAD = angle ODA = x (let) Now in triangle OAD Angle A + angle O + angle D = 180 => x+ x + 45 = 180 => 2x = 180-45=> x = 135/2=> 67.5 => angle DAC = 67.5
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The diagonal of a rectangle are equal and bisect each other which => OA = OD => angle OAD = angle ODA = x (let) Now in triangle OAD Angle A + angle O + angle D = 180 => x+ x + 45 = 180 => 2x = 180-45=> x = 135/2=> 67.5 => angle DAC = 67.5
2015-01-02T12:35:04+05:30

This Is a Certified Answer

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Certified answers contain reliable, trustworthy information vouched for by a hand-picked team of experts. Brainly has millions of high quality answers, all of them carefully moderated by our most trusted community members, but certified answers are the finest of the finest.
In a rectangle the diagonals bisect each other.  Hence the triangle OAD is an Isosceles triangle.

Hence,    angle DAC + angle ADO + angle AOD = 180
  as      angle DAC = angle ADO  ,  

 angle DAC = angle ADO = (180 - 45) / 2 = 67.5 degrees
 

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