Lines
These straight lines never meet.
What are parallel lines?
This triangle has three equal sides.
What is an equilateral triangle?
A 900 angle.
What is a right angle?
This is the name of a line that cuts through two parallel lines.
What is a transversal?
This triangle has 2 sides the same length.
What is an isosceles triangle?
It has four equal sides and four equal angles.
What is a square?
Complementary angles
What are two angles that add up to 90o?
An angle that is smaller than 90o.
What is an acute angle?
In this transformation, a shape is mirrored across a line.
Reflection
Three interior angles of a triangle add up to this.
What is 180 degrees?
A shape is scaled to either increase or decrease in size.
What is a dilation?
An angle that is bigger than 90o.
What is an obtuse angle?
Linear pair of angles.
What are angles that when put together make a straight line?
This triangle has 3 sides with different lengths.
What is a scalene triangle?
These congruent angles are across from each other where two lines intersect.
What are vertical angles?
An example is railroad tracks.
What are parallel lines?
This triangle has a 90o angle.
What is a right triangle?
These shapes exact replicas, though they may be transformed through a rigid transformation.
What are congruent shapes?
These two angles add up to 180o.
What are supplementary angles?