Triangles
A triangle with all angles equal
What is an equiangular triangle?
Two angles whose sides are opposite rays
What are vertical angles?
A line that intersects two or more lines
What is a transversal?
Any four-sided polygon
What is a quadrilateral?
Tool that numbers points so positive differences measure distance
What is a ruler?
If two sides of a triangle are equal, the angles opposite them are…
What are equal?
If the angles in a linear pair are equal, their sides are…
What are perpendicular?
Equal corresponding angles imply the lines are…
What are parallel?
An equiangular quadrilateral
What is a rectangle?
Positive differences on a ruler measure…
What is distance?
A triangle whose acute angles are complementary
What is a right triangle?
Angles that add up to 180°
What are supplementary angles?
Interior angles on the same side of a transversal of parallel lines are…
What is supplementary?
A quadrilateral with both pairs of opposite sides parallel
What is a parallelogram?
If A–B–C, then AB + BC = AC
What is the Betweenness of Points Theorem?
The theorem stating the sum of any two sides of a triangle is greater than the third
What is the Triangle Inequality Theorem?
Positive number differences in a half-rotation measure…
What are angles?
Daily Double Bonus: What is the tool used to measure the half-rotation?
In a ____________, two lines perpendicular to the same line are parallel.
What is a plane?
For a quadrilateral to be a parallelogram, its diagonals must…
What is bisect each other?
In OA–OB–OC, which ray lies between the other two?
What is OB?
The theorem stating an exterior angle equals the sum of the remote interior angles
What is the Exterior Angle Theorem?
Equal ______ angles mean lines are parallel
What are corresponding angles?
What are alternate interior angles?
Interior angles that add to 180° and prove lines parallel
What are supplementary interior angles or same-side interior angles?
The sum of the interior angles of a quadrilateral
What is 360 degrees?
Two points are symmetric with respect to a _____________if it is the midpoint
What is a point?