Old Exam Questions #7

First, my solution to Old Exam Question #6

1966

solna

I *think* I have a nice proof without words. I’m probably wrong. Incidentally I was wrong with last month’s solution. The corrected version is online now. I put the right angle in the wrong place. Oops.

Aaaanyway, here’s the next one from a Cambridge Maths Exam from 1918:

1918:

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