Unit 4: Triangles Vocabulary

Triangle that has one obtuse (bigger than 90) angle

• Obtuse Triangle

• Right Triangle

• Acute Triangle

• Isosceles Triangle

Tags

CCSS.4.G.A.2

Triangle that has a right (exactly 90) angle

• Obtuse Triangle

• Right Triangle

• Acute Triangle

• Isosceles Triangle

Tags

CCSS.4.G.A.2

Triangle with all acute (less than 90) angles

• Obtuse Triangle

• Right Triangle

• Acute Triangle

• Isosceles Triangle

Tags

CCSS.4.G.A.2

Triangle with two congruent (same) sides

• Obtuse Triangle

• Right Triangle

• Acute Triangle

• Isosceles Triangle

Tags

CCSS.4.G.A.2

Triangle with no sides that are the same.

• Scalene Triangle

• Equiangular

• Equilateral Triangle

• SAS Congruence

Tags

CCSS.4.G.A.2

When all angles are the same

• Scalene Triangle

• Equiangular

• Equilateral Triangle

• SAS Congruence

Tags

CCSS.4.G.A.2

Triangle with all sides the same

• Scalene Triangle

• Equiangular

• Equilateral Triangle

• SAS Congruence

Tags

CCSS.4.G.A.2

If two sides and the included angle of one triangle are congruent to two sides and the included angle of another triangle, then the triangles are congruent.

• Scalene Triangle

• Equiangular

• Equilateral Triangle

• SAS Congruence

Tags

CCSS.HSG.SRT.B.5

Angles inside a triangle; they sum to 180 degrees

• Interior Angles of a Triangle

• Exterior Angle Theorem

• Triangle Angle Sum Theorem

• corresponding parts of congruent triangles are congruent (CPCTC)

Tags

CCSS.8.G.A.5

The measure of an exterior angle of a triangle is equal to the sum of the measures of the two remote interior angles.

• Interior Angles of a Triangle

• Exterior Angle Theorem

• Triangle Angle Sum Theorem

• corresponding parts of congruent triangles are congruent (CPCTC)

Tags

CCSS.8.G.A.5