Download Acute Angle

Adjacent angles
Two angles in the same plane that
have a common vertex and a
common side, but no common
interior points.
Acute Triangle
A triangle all of whose angles are
acute
Base
The side opposite the vertex angle
in an isosceles triangle.
Base angle
In an isosceles triangle, the angle
formed by the base and one of the
legs.
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Remote interior angles
Hypotenuse
The angles of a triangle that are
In a right triangle, the side
not adjacent to the given exterior
angle.
opposite the right angle.
Equiangular Triangle
Isosceles Triangle
A triangle with all angles
A triangle with at least two sides
congruent.
congruent.
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Legs
Exterior angle
The congruent sides of an
An angle that forms a linear pair
isosceles triangle.
with one of the angles of a triangle.
Included angle
Equilateral Triangle
In a triangle, the angle formed by
A triangle with all sides congruent.
two sides.
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Vertex angle
Obtuse triangle
In an isosceles triangle, the angle
A triangle with an obtuse angle.
formed by the congruent sides.
Scalene Triangle
Vertex
A triangle with no two sides
For an angle, the common
congruent.
endpoint of the two rays that form
the angle
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Congruent triangles
Right Triangle
Triangles that have their
 A triangle with one right angle.
corresponding parts congruent..
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