Basic Elements
A term representing a location in space with no size.
What is a point?
Two angles whose measures sum to 90 degrees.
What are complementary angles?
The sum of the interior angles of any triangle.
What is 180°?
A triangle that has at least two congruent sides.
What is an isosceles triangle?
A quadrilateral with two pairs of parallel sides.
What is a parallelogram?
A point, line, or ray that divides a segment into two equal halves.
What is a segment bisector?
A pair of adjacent angles that form a straight line.
What is a linear pair?
The sum of the interior angles of any four-sided polygon (quadrilateral).
What is 360°?
A triangle where no two sides are the same length.
What is a scalene triangle?
A parallelogram with four right angles.
What is a rectangle?
If point B is between points A and C, then AB + BC is equal to this.
What is AC?
(Or "The whole segment.")
Lines in the same plane that never intersect.
What are parallel lines?
A quadrilateral that has exactly one pair of parallel sides.
What is a trapezoid?
The longest side of a right triangle, located opposite the 90 degree angle.
What is the hypotenuse?
A regular quadrilateral that has four right angles and four equal sides.
What is a square?
Calculate the length between (0,0) and (3,4).
What is 5?
When parallel lines are cut by a transversal, these "Z-shaped" angles are congruent.
What are alternate interior angles?
A segment that connects two non-consecutive vertices of a polygon.
What is a diagonal?
In triangle ABC, if the measure of angle A = 40° and the measure of angle B = 60°, this is the measure of the exterior angle at vertex C.
What is 100°?
Note: Using the Remote Interior Angles Theorem (40 + 60).
A parallelogram with four congruent sides.
What is a rhombus?
Points that lie on the same line are called ______, while points on the same flat surface are ______.
What are collinear and coplanar?
Two lines that intersect to form four right angles.
What are perpendicular lines?
Find the area of a triangle with a base of 10 and a height of 6.
What is 30?
These are the five valid "shortcuts" (abbreviations) used to prove that two triangles are congruent.
What are SSS, SAS, ASA, AAS, and HL?
Every one of these is a rectangle and a rhombus, but not every rectangle or rhombus is one of these.
What is a square?