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Transcript
Classifying triangles and angle sum 1415 9th.notebook November 06, 2014 Geo Opener 11/6/14 Learning Classifying triangles Targets Classify these by sides and angles Classify these triangles by sides and angles 30 o Scalene Obtuse Isosceles Right 45o 5 60o Acute Equiangular Equilateral 5 3 20o 60o 45o Isosceles 60o 5 3 Acute Acute 50 o Scalene Right Obtuse Equiangular 60o 70o Scalene Scalene Isosceles Equilateral Classifying triangles and angle sum 1415 9th.notebook November 06, 2014 Pull for Solution always never acute right Equilateral Triangles obtuse isosceles Sort the words to describe an equilateral triangle. scalene equilateral equiangular Always never right acute obtuse isosceles equiangular equilateral scalene Pull for Solution acute scalene right obtuse equilateral Isosceles Triangles isosceles equiangular Sort the words to describe an isosceles triangle. sometimes acute right obtuse never scalene equilateral equiangular isosceles Classifying triangles and angle sum 1415 9th.notebook November 06, 2014 Pull for Solution sometimes acute never isosceles rightScalene Triangles equilateral obtuse equiangular scalene Sort the words to describe a scalene triangle. sometimes never isosceles acute equilateral right obtuse scalene equiangular Sketch an example of the following triangles Acute Scalene Obtuse Isosceles Classifying triangles and angle sum 1415 9th.notebook November 06, 2014 Angle Sum Theorem The sum of the angle measures in a triangle is ____ o Why??? Informal proof 2 3 A 2 ab D B 4 1 5 1 3 C Formal proof The sum of the angle in a triangle is 180o if ABC is a triangle then 1) ABC is a triangle 1) Given Classifying triangles and angle sum 1415 9th.notebook Find the numbered angle measures c) November 06, 2014 a) b) d) Attachments Def of derivative.gsp
