Basic Terms
Angles
Triangles
100

a position in space

What is a point?

100

an angle which measures more than 0 degrees but less than 90 degrees

What is an acute angle?

100

a triangle has 3 equal sides and 3 equal angles

What is equilateral?

200

Goes on forever in one direction with definite starting point

What is a ray?

200

an angle that measures more than 90 degrees

What is an obtuse angle?

200

a triangle that forms a right angle on one of its angles

What is a right triangle?

300
Goes on forever in both directions

What is a line?

300

an angle that measures 90 degrees

What is a right angle?

300

a triangle that has 2 equal sides and 2 equal angles

What is an isosceles triangle?

400
Has a definite starting point and ending point

What is a line segment?

400

a triangle that has one obtuse angle

What is an obtuse triangle?

500

 shape consisting of all points in a plane that are at a given distance from a given point, the center

What is a circle?

500

a triangle with 3 unequal angles and 3 unequal sides


What is a scalene triangle?

600

identical in form; coinciding exactly when superimposed.

What is congruent?