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Classifications by side length or comparison of angles and sides:
scalene - no sides or angles equal
isosceles - two sides and angles equal (congruent)
equilateral - all sides and angles equal (all 60° angles)
Classifications by included angles :
right triangle - contains a 90° angle (right angle)
oblique triangle - has no right angle
acute triangle - contains all angles less than 90°
obtuse triangle - contains one angle greater than 90°
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What are three different types of triangles?
equilateral,isosceles and scalene
What three shapes can be put together to make a trapezoid?
Three triangles.
If two triangles have three pairs of congruent angles then the triangles are not guaranteed to be congruent?
Correct. Congruency means that two triangles have three pairs of congruent angles and corresponding sides of the same lengths. A pair of triangles with three pairs of congruent angles but sides of different lengths are similar, not congruent.
How many distinct triangles can be constructed by connecting three different vertice's of a cube?
one
What are the names of the triangles by side lenghts?
Scalene triangle = All sides are different lengths Isosceles triangle = Two sides have the same length Equilateral triangle = All three sides are the same length
