Triangles Let’s Learn Together We can classify triangles based on the lengths of their sides:
R
D
A
B
C
P
Q
E
F
Equilateral
Isosceles
Scalene
Or by the angles inside the triangle:
Right
Obtuse
Acute
Is a triangle a polygon?
Yes, a polygon is any closed shape with straight sides.
Ah, so a triangle is a 3-sided polygon!
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