Do YOU know Pythagoras' Theorem to the fifth decimal place?

If that is what they were asked, without numerical values.....

If they think you can quote a non-numerical, Pure Geometry theorem to even one decimal place, they are lost from the start!

Still, the screen-shot alone reveals the gormless level of the context.......

You and I know why, but for anyone who does not, here it is:

For a right-angled triangle of sides A, B and Hypotenuse H;

H^2 = A^2 + B^2.

- and it works whether all 3 sides are of integer lengths (e.g. 3:4:5) or involve fractions whose decimal places might matter!