Who can help me to explain the second grade congruent triangle "ruler and gauge drawing"
It's my pleasure to answer your question. Is your question "to make a triangle congruent with a known triangle"? If it is, the method is as follows: 1. Set three fixed points of a known triangle as a B C. 2. Draw a straight line at will. 3. Cut the length of ab side of a known triangle (note that the radian of the circular gauge should be greater than cab). 4. Draw an arc with B as the vertex BC length, 5. Connect these three points to form a closed triangle. 6. Name the new triangle (be careful not to repeat the letter with the known triangle, let it be the triangle XYZ). 7. Write the conclusion: that is, △ XYZ is the result. The proof is completed. Principle: SAS