Geometry - Chapter 1-6 Vocabulary

Congruent

The corresponding angles and sides have equal measures.

Corresponding Parts

Points, sides, edges, or angles in two or more figures that are images of each other with respect to a sequence of transformations.

Flowchart

A diagram showing an argument for a conclusion from certain evidence.

Cosine Ratio

In a right triangle, the ____ ratio of an acute ∠A is the adjacent leg divided by the hypotenuse

Sine Ratio

In a right triangle, the _ ratio of an acute angle is the opposite leg divided by the hypotenuse

Tangent Ratio

In a right triangle, the ____ ratio of an acute angle is the opposite leg divided by the adjacent leg

Slope Angle

The acute angle a line forms with the x-axis on a coordinate graph

Complementary angles

Two angles whose measures add up to 90°.

Hypotenuse

The longest side of a right triangle.

Parallelogram

A quadrilateral with two pairs of parallel sides.

Rectangle

A quadrilateral with four right angles.

Rhombus

A quadrilateral with four congruent sides.

Square

A quadrilateral with four right angles and four congruent sides.

Straight Angle

An angle that measures 180°.

Supplementary Angles

Two angles a and b for which a + b = 180°.

Transversal

A line that intersects two or more other lines on a flat surface (plane).

Trapezoid

A quadrilateral with at least one pair of parallel sides.

Vertical Angles

The two opposite (that is, non-adjacent) angles formed by two intersecting lines.

Segment

A straight path between two distinct points, called endpoints

Diagonal

Any sloping line or direction from one side to another, like from corner to corner in a square or rectangle, representing an oblique or slanted path.

Zoom Factor

The amount each side of a figure is multiplied by when the figure is proportionally enlarged or reduced in size.

Rotation

A rigid transformation that turns a figure around a fixed point (center of rotation) by a specific angle, preserving its shape and size but changing its orientation, moving either clockwise (negative) or counter-clockwise (positive)

Translation

A transformation that preserves the size, shape, and orientation of a figure while sliding (moving) it to a new location

Reflection

A transformation that flips a figure across a line (the line of reflection), creating a mirror image (the image) that is congruent (same size and shape) but has opposite orientation

Dilation

A transformation which produces a figure similar to the original by proportionally shrinking or stretching the figure.

Function

A special relationship where every input (x-value) from a set (the domain) is assigned to exactly one output (y-value) in another set

Similar Figures

Have the exact same shape but can differ in size, meaning their corresponding angles are equal, and their corresponding sides are proportional

Kite

A quadrilateral with two pairs of equal-length, adjacent sides