11. Use the coordinates below to determine if MBC and ADEF are congruent. A(2, -8), B(-5, -2), C(-7,3), D(-9, 7), E(-11, 12), F(-2, 1)

AB =

DE =

BC =

EF=

AC =

DF =

Are the triangles congruent? If yes, explain your reasoning and write a congruency statement.

there is no diagram : /

step-by-step explanation:

256π units²   (answer b)

step-by-step explanation:

the formula for the surface area of a sphere of radius r

is             a = 4πr²

and so, if r = 8 units, then the surface area is:

a = 4π(8 units)² = 256π units²   (answer b)