Triangle Types
Angle Relationships
Congruence
Triangle Vocab
100

What is an equilateral triangle?

A triangle with all equal sides.

100

What are complementary angles?

2 angles that add up to 180 degrees

100

What is SSS?

Side-Side-Side

100

What is a median?

A segment from a vertex to the midpoint of the opposite side.

200

What is an obtuse triangle?

A triangle with one angle greater than 90 degrees

200

What are vertical angles?

Opposite angles formed by 2 intersecting lines

200

What is SAS?

Side-Angle-Side

200

What is an altitude?

A perpendictular segment from a vertex to the opposie side.

300

What is an isosceles triangle?

A triangle with exactly 2 equal sides

300

What are supplemtary angles?

 2 angles that add up to 180 degrees

300

What is ASA?

Angle-Side-Angle

300

What is an angle bisector?

A ray that divides an angle into 2 equal angles

400

what is a right triangle?

A triangle with one 90 degree angle.

400

What is a linear pair?

Angles that are next to each other and form a straight line

400

What is HL?

hypotenuse-leg

400

What is the centroid?

The point where all 3 medians intersect

500

what is an acute triangle?

A triangle where all angles are less than 90 degrees

500

What are congruent lines?

Lines that are equal or have the exact same length

500

What are sides and angles?

Lines that join to form an angle

500

What is the hypotenuse?

The longest side of a right triangle.