Acute, Right, Obtuse
Isosceles, Scalene, Equilateral
Angles
Naming Triangles
Parallel and Perpendicular
100

Acute

Angles less than 90 degrees

100

Isoceles

Triangle with 2 of the same sides

100

Name the angle: 

Acute

100

Name the triangle:


Acute Scalene

100

Parallel or perpendicular


Parallel 

200

Right

One 90 degree angle

200

Scalene

Triangle with no sides that are the same size

200

Name the angle:

Obtuse

200

Name the triangle:


Acute Isosceles

200

Parallel or perpendicular

Perpendicular 

300

Straight

Angle that measures 180 degrees

300

Equilateral

Triangle that all three sides are the same size

300

Name the angle:


Right

300

Name the triangle:


Acute Equilateral

300

Lines that never intersect 

Parallel 

400

Obtuse

Measures more than 90 degrees but less than 180 degrees

400

Isosceles

Triangle that has 2 sides that are the same size

400

Name the angle:


Acute

400

Name the triangle:


Right Isosceles

400

Lines that intersect to form a right angle 

Perpendicular 

500

Acute

Less than 90 degrees but more than 0 degrees

500

Scalene

Triangle that has no sides that are the same size

500

Name the angle:


Obtuse

500

Name the triangle:

Obtuse Scalene

500

Parallel or perpendicular 

Both