Grade 4 - Progress in Mathematics

(Marvins-Underground-K-12) #1

Triangles


10-7


Some isosceles
triangles are also
right triangles.

These polygons are all triangles. Yo u can classify
triangles by their angles and their sides.
These triangles are all right triangles.

All right triangles have 1 right angle.

These triangles are all isosceles triangles.

All isosceles triangles have at least 2 sides equal in length.

These triangles are all equilateral triangles.

All the sides of an equilateral triangle are equal in length.

These triangles are all scalene triangles.

None of the sides of a scalene triangle are equal
in length to each other.

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