Draw a vertical line from a vertex of a triangle to the line of its opposite side. What is the line between the vertex and? The line segment is called the height of the triangle. At what point do the three heights of the triangle intersect?

The line segment whose vertex is perpendicular to the opposite side is called high

In a triangle, the line segment from the vertex to the perpendicular foot is called the line segment of the triangle____ For short, the height of a triangle

High line of triangle

The point with equal distance to all three sides of the triangle is ()
A. The intersection of three midlines B. the intersection of three heights C. the intersection of three vertical bisectors D. the intersection of three angular bisectors

∵ the distance from the point on the bisector of the angle to both sides of the angle is equal, and the point with the same distance to the three sides of the triangle is the intersection of the three bisectors

Is it the angle bisector or the intersection of the middle line that the distance from the triangle to the three vertices is equal?

The intersection of the vertical bisectors is the same distance from the triangle to the three vertices
Not angular bisectors and midlines

The intersection point of the middle lines of the three sides of a triangle is the center of gravity of the triangle. The distance from the center of gravity to the vertex is twice the distance from the center of gravity to the midpoint of the opposite side
How to ask? (urgent)!

Here's the question
First, the center of gravity is the intersection of the middle lines of the triangle
Draw a triangle, ABC, BD and CE are the center line, intersecting F
Connecting De,
Because De is the median line
△DEF∽△BCF
DF:FB=DE:BC=1:2
FB=2FD
Get it!
Is it very simple?

How to use the Geometer's Sketchpad to make the following geometric transformation Animation: rotate the isosceles right triangle around the right angle vertex by 90 ° to find the area swept by the hypotenuse
I'd like to see the process of bevel sweeping. Let's set the right angle side as 1

How to make a triangle rotate 180 degrees around a vertex in PPT?
Using PowerPoint 2003 to do a triangle around a vertex rotation 180 degrees animation, not around the center of rotation!

How good to make with flash!

How to make a rotating windmill with Geometer's Sketchpad

1. Draw a circle and take any point on the circle to connect the center of the circle
2. Then make the shape of the windmill you want on it
3. Double click the center of the circle to mark it as the center, then select the windmill and click "rotate → confirm". As for the angle and times, it depends on different requirements
If you need help, please come to me

How to change the unit length of Geometer's Sketchpad?
How to change the unit length of rectangular coordinate system in Geometer's Sketchpad?
Just change one axis, such as X axis, not y axis, or vice versa!

In fact, it's very simple. When you select a grid, you need to select "rectangular grid"
Specifically
Chart grid rectangular grid
Then click the number on the axis and drag it up and down to change it

How to make a rotated equilateral triangle with the Geometer's Sketchpad so that the side length of the triangle remains unchanged
In the Geometer's Sketchpad interface, demonstrate that an equilateral triangle rotates around a vertex, but the length of the triangle remains unchanged

First draw a circle, then take the center of the circle as a vertex, find a point a on the circle (not the original point that controls the size of the circle), draw the radius, and then draw another point B to become an equilateral triangle. Click a, and do the following operations on a: the second [Edit] - operation button animation in the order menu bar, and you can debug the others

Draw a vertical line from a vertex of a triangle to the line of its opposite side. What is the line between the vertex and? The line segment is called the height of the triangle. At what point do the three heights of the triangle intersect?