Question: what is the latitude of a place that is exactly halfway between the equator and the north pole?
Answer: The 45th parallel north is often called the halfway point between the equator and the North Pole, but the true halfway point is actually 16.0 km (9.9 mi) north of the 45th parallel because Earth is an oblate spheroid; that is, it bulges at the equator and is flattened at the poles.