I mean, what food requires the plotting of congruent angles?

Using this reasoning we can tell that similar triangles have congruent angles.

Further, congruent sides in the original polygon yields congruent angles in the dual, and conversely.

Triangles with two congruent sides and one congruent angle are congruent and have the same area.

The triangles have two congruent angles, which in Euclidean geometry implies that all their angles are congruent.

The solution of the belt problem requires trigonometry and the concepts of the bitangent line, the vertical angle, and congruent angles.

It can be shown that two triangles having congruent angles (equiangular triangles) are similar, that is, the corresponding sides can be proved to be proportional.

According to studies done in the Xingu region, by AD 1400 indigenous villages had reached great proportions, with buildings, palisades, bridges, and entry gates, with bridges and roads having congruent angles to each other.

Explicitly, a first line is perpendicular to a second line if (1) the two lines meet; and (2) at the point of intersection the straight angle on one side of the first line is cut by the second line into two congruent angles.