a. Find the area of the triangle determined by the points P, Q, and R. b. Find a unit vector perpendicular to plane PQR. P(-2,2,-1), Q(-1,0,2), R(0,-1,-2) a. The area of the triangle is (Type an exact answer, using radicals as needed.) b. Which of the following is a unit vector perpendicular to plane PQR? O A. OB. O C. 1 34/19 1 3-√19 (11i + 7j + k) (7i+11j + k) voriti OD. ¹ (2i+j+ k) =(i+j)

a. Find the area of the triangle determined by the points P, Q, and R. b. Find a unit vector perpendicular to plane PQR. P(-2,2,-1), Q(-1,0,2), R(0,-1,-2) a. The area of the triangle is (Type an exact answer, using radicals as needed.) b. Which of the following is a unit vector perpendicular to plane PQR? O A. OB. O C. 1 34/19 1 3-√19 (11i + 7j + k) (7i+11j + k) voriti OD. ¹ (2i+j+ k) =(i+j)

Algebra & Trigonometry with Analytic Geometry

13th Edition

ISBN:9781133382119

Author:Swokowski

Publisher:Swokowski

Chapter8: Applications Of Trigonometry

Section8.4: The Dot Product

Problem 31E

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