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Congruent Triangles

Congruent Triangles

Example 1

Why can an obtuse triangle have only one obtuse angle?

Example 2

Why can a right triangle have only one right angle?

Example 3

Are all equilateral triangles isosceles?

Example 4

Are all isosceles triangles equilateral?

Example 5

A triangle with differing side lengths and angles of 82°, 92° and 6° is what kind of triangle?

Example 6

A triangle has at least two side lengths that are equal to each other and all three angles equaling 60°. What kind of triangle is it?

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