So the total value of a triangle is 180°
So when u calculate the missing angle its value is 42°
180°-(60°+78°) = 42°
Answer:
a = 5.3
<C = 42°
Step-by-step explanation:
<C = 180 - (60 + 78)
Law of sines:
a/sin(60) = 6/sin(78)
a = sin(60)*6 / sin(78)
a = 0.866 * 6 / 0.978
Side Original length Copy length
a 4 1
b 6 1.5
c 20 5
d 16 4
its A and D
i just took the quiz :)
Answer:3