I figured you would have a problem with that, which is why I also offered an additional way to get the distance to Venus which, ironically, derives the same number. Giving more credence to its validity.
I'll deal with the historical part of the calculation next. In the mean time can you tell me how radar managed to hit and bounce off venus and back to Earth?
Let's just clarify a few things.
Venus is a ball of basic fire isn't it? I mean, not a sun as your sun is supposed to be but a hot as hell round planet, right?
Here's the problem: You see; there's only one part of a ball you can hit to have something come directly back to you for starters.
For instance. If you throw something at a ball, you have to hit that ball at an exact point for the object to come right back to you. If you miss that sweet spot, your object flies into no mans land. See what I mean?
I mean, if I'm barking up the wrong tree, then feel free to put me right.
The next part is the Earth's spin at over 1000 mph, so let's do a little bit of maths....I know, me doing some maths.

Venus, we are told, is about 25 million miles from Earth, so let's operate the radar at venus and see what happens.
So a round trip would be 50 million miles. Let's set off the radar to aim at venus. Let's use a basic 1000 mph spin and forsake the other 38 mph equator extra just to give is an average, as the radar might not be on the equator, so it's only fair.
Ok then, so the radar is sent and it takes about four and a half minutes to get there and back, all the while the Earth is spinning.
The radar centre would have shifted approximately 74 miles away from where it sent out it's signal.
To make it even more silly. It means that the radar is veering off course every second for two and a quarter minutes, just getting to venus as the Earth spins, so how in the hell was this feat achieved?
I'm all ears.