Angles
This type of angle measures exactly 90 degrees.
Right Angle
A triangle with all sides of equal length.
What is an equilateral triangle?
]The distance across a circle through its center.
What is the diameter?
A five-sided polygon.
What is a pentagon?
A transformation that slides a figure from one location to another without turning it.
What is a translation?
The sum of the angles in a triangle is always this many degrees.
What is 180 degrees?
The longest side of a right triangle.
What is the hypotenuse?
The line segment from the center to any point on a circle.
What is the radius?
The sum of the interior angles of a quadrilateral.
What is 360 degrees?
A transformation that flips a figure over a line.
What is a reflection?
An angle that measures more than 90 degrees but less than 180 degrees.
What is an obtuse angle?
A triangle with two equal sides.
What is an isosceles triangle?
A chord that passes through the center of the circle.
What is the diameter?
A polygon with all sides and angles equal.
What is a regular polygon?
A transformation that turns a figure around a fixed point.
What is a rotation?
Two angles that add up to 180 degrees are called these.
What are supplementary angles?
The rule that states the sum of the lengths of any two sides of a triangle must be greater than the length of the third side.
What is the triangle inequality theorem?
The distance around a circle.
What is the circumference?
A transformation that changes the size of a figure but not its shape.
What is a dilation?
A transformation that turns a figure around a fixed point.
What is a rotation?
An angle measure greater than 180 degrees but less than 360 degrees.
What is a reflex angle?
The point where the medians of a triangle intersect.
What is the centroid?
A portion of the circumference of a circle.
What is an arc?
The formula for finding the sum of the interior angles of an n-sided polygon.
What is (n-2) × 180o ?
This term describes a figure that can be mapped onto itself by a reflection.
What is Symmetry