To review and extend knowledge can consult the following material. CBU Math
02 Triangles
Thursday, July 23, 2009
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DIGITAL LIBRARY
To review and extend knowledge can consult the following material. CBU Math
02 Triangles
To review and extend knowledge can consult the following material. CBU Math
02 Triangles
Monday, July 20, 2009
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Regularities in geometry
1. SUM OF INTERIOR ANGLES OF A TRIANGLE.
Notes to next figure.
To the left is a triangle with the measure of its three interior angles.
Right angles are placed one after the other. Check it
moving the vertices of the triangle.
What do you notice about the sum of the three angles?
Move the vertices and see if your conjecture is true for any triangle.
2. SUM OF INTERIOR ANGLES OF A RING.
What about the sum of the interior angles of quadrilaterals? Research
dedúcelo the figure and the same.
3. SUM OF INTERIOR ANGLES OF A PENTAGON.
Following the above reasoning as follows add the interior angles of a pentagon.
4. GENERALIZED
Find a general formula that allows you to calculate the sum of the interior angles of any polygon if you know how many sides does.
For example: How much are the interior angles of a polygon with 12 sides?
Post a comment with what you've discovered. And put your name and comment because this group is qualified! 
1. SUM OF INTERIOR ANGLES OF A TRIANGLE.
Notes to next figure.
To the left is a triangle with the measure of its three interior angles.
Right angles are placed one after the other. Check it
moving the vertices of the triangle.
What do you notice about the sum of the three angles?
Move the vertices and see if your conjecture is true for any triangle.
2. SUM OF INTERIOR ANGLES OF A RING.
What about the sum of the interior angles of quadrilaterals? Research
dedúcelo the figure and the same.
3. SUM OF INTERIOR ANGLES OF A PENTAGON.
Following the above reasoning as follows add the interior angles of a pentagon.
4. GENERALIZED
Find a general formula that allows you to calculate the sum of the interior angles of any polygon if you know how many sides does.
For example: How much are the interior angles of a polygon with 12 sides?
Post a comment with what you've discovered. And put your name and comment because this group is qualified!
Sunday, July 19, 2009
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TRIANGLES
call the triangle three-sided polygons, which are determined by three unaligned points we call vertices .
The vertices are the points of intersection of the sides and are denoted by capital letters. In the figure are A, B and C.
The sides are segments and are denoted with the same letter as the opposite corner but in lower case: in the figure are a, b, c.
angles are denoted with the same letter as the corresponding vertex.
The three basic elements of a triangle are sides, corners and angles.
CLASSIFICATION OF TRIANGLES .
To classify triangles can follow two criteria, their sides or angles. Below is a summary outline.
PROPERTY. The sum of the three interior angles of a triangle is 180 ° 
call the triangle three-sided polygons, which are determined by three unaligned points we call vertices .
The vertices are the points of intersection of the sides and are denoted by capital letters. In the figure are A, B and C.
The sides are segments and are denoted with the same letter as the opposite corner but in lower case: in the figure are a, b, c.
angles are denoted with the same letter as the corresponding vertex.
The three basic elements of a triangle are sides, corners and angles.
CLASSIFICATION OF TRIANGLES .
To classify triangles can follow two criteria, their sides or angles. Below is a summary outline.
PROPERTY. The sum of the three interior angles of a triangle is 180 °