Answer:
s = -106
Step-by-step explanation:
Answer:
All squares have four equal angles
Step-by-step explanation:
Every square must have four equal angles to be a square
So firstly, add both sides by 6: 
Next, multiply both sides by 4, and your answer will be 
A and c would equal 70 degrees
And d would equal 110 degree
Answer:
: c2 = a2 + b2 - 2ab cos C
c²=20²+15²-2×15×20×cos50
c²=400+225-600×0.64
c²=241
c=√241=15.5ft