<transcript><audio_33> esse pedaço de circunferência que a gente não precisa traçar. Quando eu faço isso, eu determinei dois pontos A e B</transcript><transcript><audio_34> tais que P é o ponto médio desse segmento. Se eu traçar a mediatriz do segmento AB, eu vou ter a perpendicular que passa pelo ponto médio. Ou seja, eu tenho exatamente a solução desse problema. E traçar a mediatriz</transcript><transcript><audio_35> em uma construção que a gente já fez. Então, na verdade, eu nem preciso. Basta agora eu dizer que traçando a mediatriz de AB, eu tenho a reta que eu quero aqui. A reta perpendicular. A reta R passando por P. Tá bom?</transcript><video><caption><image_36>The image shows a man standing in front of a green chalkboard. He is wearing a blue t-shirt and glasses and is writing on the chalkboard with a white chalk. The chalkboard has some text written on it in Spanish, which appears to be a mathematical equation. The man is holding a piece of chalk in his right hand and is in the process of writing on a piece. There is a wooden frame on the right side of the image.</caption><caption><image_37>The image shows a man standing in front of a green chalkboard. He is wearing a blue t-shirt and glasses and is looking up at the chalkboard with a serious expression on his face. On the blackboard, there is a mathematical equation written in white chalk. The equation appears to be a trigonometric equation, as there are two lines intersecting at the top and bottom of the equation. The man is standing on a wooden platform and appears to have his hands in his pockets.</caption></video><caption><image_38>The image shows a man standing in front of a green chalkboard. He is wearing a blue t-shirt and glasses and is holding a yellow stick in his right hand. On the chalkboard, there is a mathematical equation written in Spanish. The equation is a triangle with a right angle and a left angle. The man appears to be explaining the equation to the viewer.</caption><transcript><audio_39> para a nossa próxima construção elementar, que é a construção da bissetriz de um ângulo. Aqui tem uma figura, que é um ângulo, o nome dessa figura é ângulo, todo mundo conhece bem, e eu quero traçar a bissetriz desse ângulo.</transcript><transcript><audio_40> é aquela semirreta que divide o ângulo em dois ângulos iguais. A gente conhece mais propriedades dessa bissetriz que é a seguinte. Se eu tenho uma bissetriz...</transcript><caption><image_41>The image shows a man standing in front of a green chalkboard. He is wearing a blue t-shirt and glasses and appears to be giving a presentation. On the chalkboard, there is a white chalk drawing of a triangle and some text written in Spanish. The text reads "Contenidos Geometráticos Légendores" which translates to "Geometric Geometry" in English. The man is holding a pointer in his right hand and is gesturing with his left hand as he speaks.</caption> this piece of circumference that we don't need to trace, okay, when I do that, Oh, I determined two points A and B are two points A and B are Such that p is the midpoint of this segment, if I draw the perpendicular bisector of the segment AB I will have the perpendicular that passes through the midpoint, that is, I have exactly the solution to this problem and draw bisector was already a construction that we already made So in fact I don't even need it, now I just need to say that the traction of the bisector of ab I have the straight line that I want here, which is the straight line perpendicular to the straight r passing through P, okay, then  Let's go to our next elementary construction, which is the construction of the bisector of an angle, here there is a figure that is an angle, the name of this figure is an angle, everyone knows it well, okay, and I want to draw the bisector of this angle of this angle and the bisector is  It's that half-line that divides the angle into two equal angles, okay, and we know more properties like this bisector, which is as follows, if I have a bisector,
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