Geometry Triangle Vocabulary

The Pythagorean Theorem ONLY works on which triangle?

• obtuse

• scalene

• isosceles

• right

A triangle that has all angles less than 90°.

• Acute Triangle

• Right Triangle

• Obtuse Triangle

• Equiangular Triangle

Having exactly the same size and shape.

• Median

• Congruent

• Altitude

• Polygon

A triangle that has a right angle.

• Acute Triangle

• Right Triangle

• Obtuse Triangle

• Equiangular Triangle

The angle formed by the legs of an isoceles triangle.

• Acute Angle

• Base Angle

• Straight Angle

• Vertex Angle

Either of the sides in a right triangle opposite an acute angle.

• Hypotenuse

• Legs

• Vertex

• Base

The two angles that are adjacent to the base of an isosceles triangle.

• Base Angles

• Vertex Angles

• Obtuse Angles

• Right Angles

A triangle with two equal sides.

• Scalene

• Isosceles

• Equilateral

• Acute

A triangle that has an angle greater than 90°.

• Acute Triangle

• Right Triangle

• Obtuse Triangle

• Equiangular Triangle

A triangle with all sides of different lengths.

• Scalene

• Isosceles

• Equilateral

• Acute