NGEC 9 - pdf_Triangle Basics.pdf - Triangles A triangle is...

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Triangles
A triangle is a polygon with three sides.
Classifying Triangles For example, A B C We name a triangle using its vertices. ∆ABC ∆BAC ∆CAB ∆CBA ∆BCA ∆ACB
Opposite Sides and Angles A B C We say that is opposite . A BC What is opposite ? C What is opposite of ? CA
Triangles can be classified by their Sides Scalene Isosceles Equilateral Angles Acute Right Obtuse Equiangular
Equilateral Triangle A triangle in which all 3 sides are equal m AC = 7.00 cm m BC = 7.00 cm m AB = 7.00 cm A B C