Geometry
NC.4.G.2 – Classify quadrilaterals and triangles based on angle measure, side lengths, and the presence or absence of parallel or perpendicular lines.
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[chorus]
Triangles, 3 sides, 3 angles.
Triangles, 3 sides, 3 angles.
Triangles, 3 sides, 3 angles.
Triangle is a polygon, triangle is a polygon.
[verse]
An acute triangle has 3 angles
that are less than 90 degrees.
An obtuse triangle has 3 angles
but 1 angle is more than 90 degrees.
A right triangle has 3 angles
but 1 angle equals 90 degrees.
An equilateral triangle has 3 sides,
and all 3 sides are equal.
Isosceles triangle has 3 sides,
but only 2 of those sides are equal.
A scalene triangle has 3 sides.
All 3 sides have different sizes.
[chorus]
Triangles, 3 sides, 3 angles.
Triangles, 3 sides, 3 angles.
Triangles, 3 sides, 3 angles.
Triangle is a polygon, triangle is a polygon.