Charlie draws the triangle shown. Why is his figure impossible? Select the 3 that apply.
15²+17²-2(15) (17) cos(58) = 212
212+172-2(21)(17) cos(42°) #152
17
4
21
sin (70°) sin (58)
I
☐ sin (42°) sin (58°)
17
4
15
152+212-2(15)(21) cos (42°) #172
21 m
701
42"
17 m
15 m
581
