It is known that in △ ABC, a = 40 °, B = 60 °, C = 80 ° and in △ def, d = 90 °, e = 37 °, f = 53 ° and BC = EF, If they are combined into a quadrilateral, the minimum value of the external angle of the quadrilateral is? Thank you···

It is known that in △ ABC, a = 40 °, B = 60 °, C = 80 ° and in △ def, d = 90 °, e = 37 °, f = 53 ° and BC = EF, If they are combined into a quadrilateral, the minimum value of the external angle of the quadrilateral is? Thank you···

If BC and EF are put together ∠ C and ∠ F, and ∠ B and ∠ e, then ∠ AF [C] d is the largest angle of quadrilateral abdc, and the complementary angle of ∠ AF [C] d is the smallest, that is, the minimum external angle of quadrilateral abdc is 47 degrees

Given the triangle ABC congruence and triangle EFG, ab = EF, BC = FG, angle a = 68 degrees, angle f = 84 degrees. Find the degree of angle B and angle C

∵ triangle ABC congruence and triangle EFG
In addition, it can be seen from the following aspects: 1
∴∠C=180°-∠A-∠B=28°

Known: triangle ABC congruent and triangle EFG, ab = EF, BC = FG, angle a = 68 degrees, angle g = 58 degrees, find angle B and angle C

According to the relationship between the corresponding sides of the two triangles, draw the graph angle c corresponding to angle g, that is, angle c = angle g = 58 degree, angle B = 180 angle a-angle C = 54 degree