I would say 20 because if you add the 10 with 10 the other shaded area so that is why i say 20
Its an isosceles triangle
angle B = 47
and triangleADB is congruent to triangle ADC
from here we can say that BD = DC
now AD is a median and also altitude
so from here we can say angle x = 90
now in triangle ADB
90+47+y=180(ANGLE SUM PROPERTY )
y= 43
I think it may be 1/4, but I am not sure. I just multiplied them and got that answer.
42 because it is all of the sides have to be added up for the perimeter so the formula would be 14+14+7+7.
