Before we begin lets look at some symbols you will need to be familiar with to continue with this chapter.
Now lets start with a basic Triangle Review. Remember that a triangle (Δ) is a polygon with 3 sides. When naming the angles it is important to remember that if more than one angle shares a vertices it HAS to be written with the 3 points (vertices always in the middle). The order of the other two points does not matter.
Triangles can be classified 2 ways. By there angle measure and by there side length. See the diagram below. Notice the congruency marks for angles and the congruency marks for sides. If sides or angles are shown with matching congruency marks then it is given that they are of equal measure.
Triangles can be classified 2 ways. By there angle measure and by there side length. See the diagram below. Notice the congruency marks for angles and the congruency marks for sides. If sides or angles are shown with matching congruency marks then it is given that they are of equal measure.
Complete the practice worksheet below, then check your answers.
It is also important to recognize the corresponding parts of triangles.
Notice in the diagram, in the congruency statement ΔABC≅ ΔDEF all of the congruent parts match up. A is in the same position as D, B is in the same position as E, the same goes for C and F. This will be covered more in another section of this unit.
Notice in the diagram, in the congruency statement ΔABC≅ ΔDEF all of the congruent parts match up. A is in the same position as D, B is in the same position as E, the same goes for C and F. This will be covered more in another section of this unit.
Angle Relationships:
You will be using these relationships to find missing angle values. Copy the examples down into your notes. If you need to see similar examples worked out select the more help link.
Complete the practice worksheet below, then check your answers.