Geometry Test Review: Angles, Triangles, and the Pythagorean Theorem

Vocabulary flashcards covering angle measurements, transversal relationships, triangle classifications by side length and angle type, and the Pythagorean Theorem.

Protractor

An instrument used to measure and draw angles precisely.

Transversal

A line that crosses two parallel lines, creating various angle relationships at the intersections.

Supplementary Angles

Two angles whose measures add up to a sum of $180^\circ$.

Complementary Angles

Two angles whose measures add up to a sum of $90^\circ$.

Alternate Angles

Pairs of non-adjacent angles situated on opposite sides of a transversal line crossing two parallel lines.

Corresponding Angles

Angles that occupy the same relative position at each intersection where a transversal crosses two parallel lines.

Opposite Angles

A pair of non-adjacent angles formed directly across from each other when two lines intersect.

Interior Angles

Angles that lie in the region between two parallel lines crossed by a transversal.

Equilateral Triangle

A triangle classified by having all three sides of equal length.

Isosceles Triangle

A triangle classified by having at least two sides of equal length.

Scalene Triangle

A triangle classified by having all three sides of different lengths.

Acute-Angled Triangle

A triangle classified by having all three interior angles measuring less than $90^\circ$.

Right-Angled Triangle

A triangle classified by having exactly one right angle measuring $90^\circ$.

Obtuse-Angled Triangle

A triangle classified by having one interior angle measuring greater than $90^\circ$.

Pythagorean Theorem

A geometric theorem ($a^2 + b^2 = c^2$) used to calculate a missing side length in a right-angled triangle.