8 centimeters equals to 80 millimeters
If you represent the problem in a diagram, you will form a triangle with 3 known length of the sides. When you are given all sides, and you are asked to find an angle, you can use the cosine law.
b^2 = a^2 + c^2 - 2ac*cosB
1.4^2 = 1.9^2 + 1^2 - 2(1.9*1)(cosB)
B = 45.78°
The answer to the first one is 72.
Answer:
(0, -3)
Step-by-step explanation:
because at that point is where the line crosses the y axis.
