Angle = 36 degrees =

=

now, radius = 10 cm
so arc = radius x angle = 10 x pi/5 = 2pi = 6.28 cm
Given b=21 and ∠β=60°,
a = 12.12436 = 7√3
j = 24.24871 = 14√3
∠α = 30° = 0.5236 rad = π/6
h = 10.5
area = 127.30573 = 147√3/2
perimeter = 57.37307
inradius = 4.43782
circumradius = 12.12436 = 7√3
Answer is
j = 24.24871 = 14√3
-6=-7+x
Make the variable to the left hand side and change it’s sign.
-6-x=-7
Move the constant to the right hand side and change its sign.
-x=-7+6
Calculate the sum
-x=-1
Change the signs of both sides of the equation .
X=1
Answer is -5
-6y + 2 = -2(4y + 4) factor first
-6y + 2 = -8y - 8 put y on one side of the equation
2y + 2 = -8 isolate y
2y = -10
y = -10/2
y = 5