5 1 classifying triangles
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5-1 Classifying Triangles

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5-1 Classifying Triangles - PowerPoint PPT Presentation


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5-1 Classifying Triangles. Geometry. A figure formed when three noncollinear points are connected by segments is a triangle. Each pair of segments forms an angle on the triangle. The vertex of each angle is a vertex of the triangle. Triangles are named by the letters of their vertices. .

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Presentation Transcript
slide2

A figure formed when three noncollinear points are connected by segments is a triangle. Each pair of segments forms an angle on the triangle.

slide4

Triangles are named by the letters of their vertices.

How you name a triangle by its vertices

ABC

slide5

Triangles can be classified by their angles. All triangles have at least two acute angles. The third angle is either acute, obtuse, or right.

slide7

All angles of an equilateral triangle are congruent, at least two are of its sides are congruent. Meaning all equilateral triangles are also isosceles triangles.

slide8

Parts of an isosceles triangle. Angles formed by the congruent sides is called the vertex angle. The congruent sides are called legs. The side opposite the vertex angle is called the base. The two angles by the base and one of the congruent sides are called based angles.

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