How to draw a nine-point circle? In fact, it is very simple to operate in the geometric sketchpad. This article will share with you a detailed tutorial on drawing a nine-point circle on the geometric sketchpad. Friends in need should take a look!

Open the geometric sketchpad and create a new blank sketchpad. In the left toolbar, select the polygon tool to draw △ABC, select the three sides AB, BC, and AC, and select the "Midpoint" command in the "Construction" menu to make the midpoint of the three sides. D, E, F.

Select point A and side BC, select "Perpendicular Line" in the "Construction" menu, make a perpendicular line, select side BC and the perpendicular line, select "Intersection" in the "Construction" menu, and find the intersection point G, which is on the side of BC. the vertical feet; use the same method to find the vertical feet H and I on sides AC and AB.

​​Select points A and G, select "Straight Line" in the "Construction" menu, and make a straight line AG. Select points B and H, select "Straight Line" in the "Construction" menu, and make a straight line BH. Select straight lines AG and BH, select "Intersection" in the "Construction" menu, and make a vertical center J.

Select points A and J, select "Line Segment" in the "Construction" menu, and make line segment AJ. Select line segment AJ, select "Midpoint" in the "Construction" menu, and make the midpoint K of line segment AJ. Use the same method to make line segment BJ. , midpoint L, M of CJ.

Select points L and G, select "Line Segment" in the "Construction" menu, and draw the line segment LG. Select the line segment LG, construct the midpoint, select "Perpendicular Line" in the "Construction" menu, and draw the vertical bisector i of the line segment LG. In the same way, draw the perpendicular bisector j of line segment EF. Select the line segments LG and EF, select "Intersection" in the "Construction" menu, and make the center O of the nine-point circle. Select points O and E, and select "Construct a circle with the center and points on the circumference" in the "Construction" menu. Make a nine-point circle O.

Dear friends, after reading the wonderful content above, you all know the detailed operation of drawing a nine-point circle on the geometric sketchpad!