Answer:
-2/5
Step-by-step explanation:
Answer:
90tan50°
Step-by-step explanation:
tan(a)=(opposite)/(adjacent)
Slope of AB=(2-3)/(1+1)=-1/2; AC=(-1-3)/(-3+1)=-4/-2=2; BC=(-1-2)/(-3-1)=-3/-4=3/4.
The product of two sides that are perpendicular is -1. Slopes of AB and AC are perpendicular so angle A is a right angle. ABC is a right-angled triangle.
A!! Yes, because adjacent sides aren’t perpendicular