Question

if a ray CD stands on a line AB then prove that angle ACD + angle B = 180 degree

Answer 1

The higest angle that you could measure is 360° that you can find if you just take end point of ray or a line segment, but as you take any point except end point on a line, ray or a line segment, then it may have 180° . As in the question the ray is cutting this angle of 180° so the sum of angle ACD and BCD must be equal to 180°.

You are free to comment if you need me to prove it mathematically.

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