Answer:
x=36° (180/5x because 2x+3x)
Step-by-step explanation:
we know that
The equation of the circle is of the form

where
is the center
is the radius
in this problem
we have


So
the center is the point 
the radius is
units
using a graph tool
see the attached figure
Answer:
125.6 cm²
Step-by-step explanation:
the area of sector = 225/360×3.14×8²
= ⅝ × 3.14 × 64
= 3.14 × 40
= 125.6 cm²