Two figures are congruent means they are equal in measure all angles and sides are congruent. so those are not labeled u can find them by looking into another figure
∠A=133°,∠M=86,∠L=41 ∠B =∠K so they are angles of quadrilateral sum of these shapes are 360. 133+86+41+x=360 x=100 ∠B=∠K=100°
