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How to answer the math and geometry questions in the second day of junior high school
The methods are: 1.

2. You will know the isosceles triangle when you meet the bisector and parallel line.

3. To find the length of the vertical line segment, we can think of the area method (representing the area of the same figure in two ways).

It takes twice as long to reach the center line.

5. There are squares or equilateral triangles in complex graphics, and there may be congruent triangles.