1
Q
Polygon
A
A closed, 2 dimensional shape made of straight lines.
2
Q
Triangle
A
A polygon with 3 sides, 3 angles and 3 vertices.
3
Q
Acute angle
A
An angle that is less than 90 degrees.
4
Q
Obtuse angle
A
An angle that is greater than 90 degrees.
5
Q
Right angle
A
An angle that is exactly 90 degrees.
6
Q
Acute triangle
A
A triangle that has 3 acute angles.
7
Q
Obtuse triangle
A
A triangle that has one angle greater than 90 degrees.
8
Q
Right triangle
A
A triangle that has one angle that is exactly 90 degrees.
9
Q
Equilateral triangle
A
A triangle that has 3 equal sides.
10
Q
Isosceles triangle
A
A triangle that has 2 equal sides.
11
Q
Scalene triangle
A
A triangle where all the sides are different lengths.
5th Grade Math
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