B When an internal line intersects an external shape, consider the intersection point Intersection points overlap, intersect edges, and internal lines intersect Considering the increasing number of intersection points, most carriers are in the form of 6-choose-1 Error-prone points: Check the error points

D total intersection point The total number of intersections is 10 Irregular intersecting graphics, choose 1 type out of 5 Consider the general rules

C Symmetry and irregularity One stroke appears in 1 and 5, but there is no overall pattern. consider intersection

Endpoint is not an intersection

D Increasing external edges Internal line intersections are incremented The key to this question is that it is easy to calculate Total number of points, intersection points of internal and external graphics Internal intersections are difficult to consider at once Number of outer frames Internal intersection points Just deliberately dazzled Figure 2 The inflection point is also the intersection point

C Intersection point within the box Endpoint is not an intersection Misunderstanding: upper intersection point of frame, intersection point of curve There is ambiguity in the intersection of internal lines and external graphics in C There are areas that cannot be seen clearly, so it is impossible to examine the upper intersection point of the frame.

D Increasing intersection point 3 internal lines Breaking point: The question stem graphics are all composed of a circular outer frame and an internal straight line, and the internal straight lines and the outer frame have obvious intersections. Considering the number of intersection points on the frame, the number of intersection points on the frame of the question stem graphics are 0, 1, 2, and 3 in order. Triangles appear in the first three figures. Considering the number of straight lines, the number of straight lines in the main figure is 3.

D The graphic on the left is asymmetrical The right side of the figure is symmetrical Internal graphic intersection 1 (distinguish between internal and external graphic intersections) Intersection point (internal intersection point/external intersection point/sum of internal and external intersection points) Observe that graphics are divided into left and right, inside and outside

Intersection point VS tangent point

Intersection point VS curved intersection point

Intersection vs endpoint

intersection point

B Easily confused with noodles

itself

outer frame

overall

faces connected by edges Faces connected by points

Maximum symmetry The central axis

overall symmetry

Surfaces and Extension Lines Intersect at point VS intersect at edge

Points increase Observe the 6 points in the chart: many aspects and many aspects

Elements with the same shape

Number of faces = number of sides

Singularity=0, 2

Endpoints are also singular points

day

field

starting point

Intersection of multiple circles

separate graphics

one stroke increment

Compare Figure 1 and Figure 6 Observe the biggest difference

Observations 2 sides of black and white figures are equal Calculate black edge - white edge = 1, 0, -1

Number of curves

number of straight lines

Number of curves number of straight lines

parallel lines

Head and tail lines

Number of strokes

Number of horizontal lines

Strokes are not equal to the number of lines A pen is not the same as a stroke Pay attention to the distinction

126/345

A

Circle tangent