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equilateral obtuse-angled acute-angled scalene congruent vertex right-angled polygon isosceles line of symmetry A triangle... vertexes side angle • is a closed figure (polygon) • has three sides • has three vertexes • has three interior angles Classifying Triangles triangle first name middle name last name Which angle is the largest? A C B Which angle is the largest? A B C Which angle is the largest? A B C Possible Middle Names for Triangles obtuse-angled right-angled acute-angled Classifying Triangles acute-angled or obtuse-angled or triangle right-angled first name middle name last name Equilateral Triangles • 3 congruent sides • 3 congruent angles • 3 lines of symmetry Isosceles Triangle • 2 congruent sides • 2 congruent angles • 1 line of symmetry Scalene Triangles • 0 congruent sides • 0 congruent angles • 0 lines of symmetry Classifying Triangles equilateral or isosceles or acute-angled or obtuse-angled or scalene right-angled first name middle name triangle last name Give the first, middle and last name for the following triangle: isoscele s first name Right-angled middle name triangle last name Give the first, middle and last name for the following triangle: isoscele s first name obtuse-angled middle name triangle last name Give the first, middle and last name for the following triangle: equilateral first name acute-angled middle name triangle last name Give the first, middle and last name for the following triangle: scalene first name acute-angled middle name triangle last name Give the first, middle and last name for the following triangle: scalene first name Right-angled middle name triangle last name Recap: Classifying Triangles equilateral or isosceles or acute-angled or obtuse-angled or scalene right-angled first name middle name triangle last name Give the first, middle and last name for the following triangle: What is the measure of < A and < B A B first name middle name last name Name The Angle What is the measure of < A and < B A B first name 400 middle name last name Name The Angle: What is the measure of < A and < B A 300 first name B middle name last name Give the first, middle and last name for the following triangle: What is the measure of <A A 300 first name middle name last name Name The Angle What is the measure of <A,<B, and < C A B first name C middle name last name What Can You Tell Me About These Figures? What Can You Tell Me About This Figure? What Can You Tell Me About This Figure? What Can You Tell Me About This Figure? What Can You Tell Me About This Figure? What Can You Tell Me About This Figure? Are These Figures Congruent?