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1·All of these are congruent triangles.

所有这些都是全等三角形。

2·In the matching process the parameters of rotation and displacement were obtained by two congruent triangles, then the point-pairs matching would be performed on the transformed sets.

比对过程中首先根据两个集合中的全等三角形求出它们的旋转和平移参数，然后对根据参数进行转换后的特征集合进行点模式匹配。

3·Angle-angle-side congruence. when two triangles have corresponding angles and sides that are congruent as shown below the triangles are congruent .

译：当两个三角形象下面所示有两个角和一个边同时相等时，这两个三角形全等。

4·In each of the following, tell whether the given pair of triangles are congruent or not.

在下列各题中，指出所提供的两个三角形是否必定全等。

5·They are located in the Moon's orbit, equidistant from both the Earth and the Moon, with which form congruent equilateral triangles .

他们都位于到月球和地球距离相等的月球轨道上，形成两个等边三角形。

6·Two triangles are congruent if they have two angles and the included side equal.

两个三角形如果有两个角及其夹边对应相等则它们全等。

7·Butterfly Mechanism consists of two congruent equilateral triangles.

蝶形单元是由两个全等的三角形组成。