Answer:
Angle B and C are congruent.
We know that:
Then:
Therefore:
Simplifying the above result we get:
-6+2=5x-x
-4=4x
-4/4=X
0=x
x^0 y^-3 / x^2 y^-1
= 1 / x^2 y^-1 (y^3) ...because x^0 = 1 and [(y^-1) (y^3)] = y^2
= 1/(x^2 y^2)
210 x 297 mm
Hope that this helps!