Show:
Triangles #1
Triangles #2
Angles #1
Angles #2
Special Segments
100
The sum total of all angles of a triangle.
What is 180 degrees?
100
A triangle that has two sides of equal length and two equal angles.
What is an isosceles triangle?
100
Angles that, when joined together, form a right angle.
What is a complementary angle?
100
An angle that measures more than 90 degrees but less than 180 degrees.
What is an obtuse angle?
100

This segment passes through a midpoint at a right angle.

What are perpendicular bisectors?

200
A triangle that contains one 90 degree angle.
What is a right angle?
200
A polygon that has three sides and three angles/vertices;
What is a triangle?
200
Two rays or line segments that extend from a single point.
What is an angle?
200

The sum of the 2 acute angles in a right triangle.

What is 90 degrees?

200

This point of concurrency is formed by angle bisectors.

What is the incenter?

300
A triangle that has three angles that each measure less than 90 degrees.
What is an acute triangle?
300
A triangle that has one angle that measres greater than 90 degrees.
What is an obtuse angle?
300
An angle that measures exactly 90 degrees.
What is a right angle?
300
An angle that measures less than 90 degrees.
What is an acute angle?
300

This segment is perpendicular to the opposite side from the vertex of a triangle, and is often called the height.

What are altitudes?

400

The name for the side opposite a right angle in a right triangle.

What is the hypotenuse?

400
A triangle that has no sides of equal length and no equal angles.
What is a scalene triangle?
400
Angles that, when joined together, form a straight line.
What is supplementary angle?
400
The point where two rays, lines, or line segments meet.
What is a vertex or (vertices)?
400

This is the balance point of a triangle and is formed by medians.

What is the centroid?

500

A triangle that has three equal sides.

What is an equilateral triangle?

500
A triangle that has two sides of equal length and two equal angles.
What is an isosceles triangle?
500
Angles that, when joined together, form a right angle.
What is complementary angles?
500
An angle that measures exactly 180 degrees.
What is a straight angle?
500

This special segment is half the length of the 3rd side and is parallel to it also.

What is a midsegment?