What is the measure of ∠j? given △abc≅△jkl, m∠b=55°, and m∠l=25

ABC congruent to JKLthis means that A = J, B = K and C = L

m < B = 55so < K = 55 also
m < L = 25so < C = 25 also
so we need the measure of < Jand < A

interior angles of a triangle add up to 180 degrees
< J + < K + < L = 180
< J + 55 + 25 = 180
< J + 80 = 180
< J = 180 - 80
< J = 100so < J = 100and so does < A