Question

- 3.3 Given the vertices of a triangle P(1, 2,0), Q(2,5,0), and R(0,4,7), find (a) the interior angles, (b) a unit vector normal to the surface containing the triangle, and (c) the area of the triangle.

PLEASE SOLVE BOTH QUESTIONS.

Answer 1

Given P (11210) Q (2,510), R. (01417) - Pal= {072 +137 = V10 (PR1 = √27 1287 (752 = 154 bor) = 1070 zaje -454 angle b/w OGR • tano (pol) = 66.7° PqQ = 45 P&R = 66:7°

Given My G4 Area = 2x1x bb 127 PO = 54 2710 -54 = 44 = 2 X 1 X v10 x ruu Area = Vox Vay Area = 10-488 units (2 magnetic intensity 200X 10 cm 200 y OD @xt. it. d=10cm > 1cm There is no change in magnetic field when l room > 1cm on - Thank you