Question

Use vectors to find the interior angles of the triangle given the following sets of vertices. Round your answer, in degrees to two decimal places. (5.5).(-2,6).(-3,0) Answer How to enter your answer Key Angle at (-3,0) 0 Angle at (-2,6) Angle at (5,5)

please solve this one and not the other one

Answer 1

Given set of vertices (7,0), (-8,-6), (2,8) ☺ A(7,0), B(-8,-6), C(2,8) determine the vector AB <-15 ,-6y AB <-8-7,-6-0) vector BC © 2 Bd rector C (2-(-8), 8-1-6)* = <10,747 @ F 4 2,0-84 (5) -8Y To find Angle at (7,0) CosA= AB. AC HABILIACII 2-15, -67,4-5,87 1715)2+(-6). / (-5)+(8)". -15 1-5) + (-6/40 (16.15)X(9.434) 75-4,8 152.3591 Cost 27 (52-359) Cost 27 A = 152.359 A- 79:8 7,0 i

BC. cos (277.9494 To find Angle A at 1-8,-6). Cos B. BA IIB|| - || 88 | 10,14). <15,.67 /15²76² 150 +84 (2/1)* (3729) 234 - 10² 234 277.949 B = + B= Tolind ongle c 32. 7 at 1-8,-6) at (2,8) 180° - B-A C = = 180° - 79.8' - 32.70 Co 67.50 Angle at (2,8 8) 4 67.59 -6 32.70 Angle at 1-8, Angle at (7,0) 79.80