math chapter 4

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Classifying triangles

one way to classify triangles is by the measures of its angles.

if all three of the angles of a triangle has acute angles, then the triangle is an acute triangle

if all three of the angles of a triangle are congruent, then the triangle is an equilateral triangle

if all three of the angles of a triangle has obtuse angles, then the triangle is an obtuse triangle

if one of the angles of a triangle is a right angle, then the triangle is a right triangle

if all 3 sides of a triangle are congruent, then the triangle is an equilateral triangle

if at least 2 sides of a triangle are congruent, then the triangle is an isosceles triangle.

no 2 sides of a triangle are congruent, then the triangle is scalene

Angle Relationships in triangles

every triangles angles equal 180 degrees

interior angles are inside the triangle

exterior angles are outside the triangle

remote interior angles- don touch the exterior part

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