Answer:
m∠B = 
.
Step-by-step explanation:
Since the three sides of the triangle are given, then we apply cosine rule.
= 
+ 
- 2ac Cos B
But, a = 660 cm, b = 680 cm, and c = 100 cm.
So that;
= 
+ 
-2(660 x 100) Cos B
462400 = 435600 + 10000 - 132000 Cos B
462400 = 445600 - 132000 Cos B
132000 Cos B = 445600 - 462400
= -16800
Cos B = 
= -0.1273
B = 
-0.1273
=
Thus, measure of ∠B is .
The best estimate is point B
I want to say D, but don't take my word for it. Good luck! <3
Answer:
29 degrees
Step-by-step explanation:
If I read your question correctly, your degree measures were
35, 52, and 3(x+2).
We know that all triangle angles measure up to 180 degrees, so we can add all of the given degree values to 180.
35+52+3(x+2)=180
Now, we can solve for x.
87+3x+6=180
93+3x=180
3x=87
x=29
