B: Find the area of the triangle with 頂点 P(3,-3,0),Q(1,2,2) and R(1,-2,5)

解

B : F in d t h e a re a o f t h e t r ian g l e w i t h v er t i ces P (3, - 3, 0), Q (1, 2, 2) an d R (1, - 2, 5)

a re a : \frac{629}{2}

十進法表記

12.53993 \dots

解答ステップ

Given:

p o in t : (1, 2, 2)

p o in t P : (3, - 3, 0)

p o in t R : (1, - 2, 5)

Find triangle area using vector cross product:

\frac{629}{2}

a re a : \frac{629}{2}