Answer:
249.6
Step-by-step explanation
There are 4 identical equilateral triangle,
we can find the area of one and multiply by 4
area of triangle = 
now 62.4*4 = 249.6
Answer:
2%
Step-by-step explanation:
Any decimal under 1, i believe.
Answer:
x =(10-√112)/2=5-2√ 7 = -0.292
x =(10+√112)/2=5+2√ 7 = 10.292