I'm able to prove $44$, but how would one deduce $43$ from it without further industry, forthwith?
$43$ seems like a reduced, 2D version of $44$? I'm not enquiring about individual proofs.
$44.$ Let $P$ be a point not on the plane that passes through the points $Q, R, S$.
Show that the distance $h$ from $P$ to the plane $ = \dfrac {\left| \left( \mathbb{a} \times \mathbb{b} \right) \cdot \mathbb{p}\right| } {\left| \mathbb{a} \times \mathbb{b}\right| }$.$43 = 39$ (5th edition). Let $P$ be a point not on the line $L$ that passes through the points $Q,R$.
Show that the distance $d$ from the point P to the line $L = \dfrac {\left| \mathbb{a} \times \mathbb{b} \right| } {\left| \mathbb{a}\right| }$.
