Unit 5 Vocab

By: Gus Koza

Acute angle

• An angle that is less than 90 degrees.

Adjacent angles

• Two angles that share a side and vertex but don’t overlap each other.

Axis

• An imaginary straight line that goes through any symmetrical shape.

Bisecting an angle

• Dividing an angle in 2 equal parts.

Concentric circles

• Circles that have their centers in the same place.

(All of the pictures found are the same.)

Congruent figures

• Figures that have the same size and shape.

Consecutive angles

• Two angles of a polygon that have a common side.

Corresponding angles or sides

• A relative side of two sides. (Same as two figures)

(All of the pictures found are the same.)

Inscribed

Isometry

• A transformation of a original figure and its image are congruent.

Line of reflection

• A line that is reflected over in a reflection.

Mid point

The halfway point of a line segment.

Obtuse angle

• An angle that is more than 90 degrees and less than 180 degrees.

Ordered number pair

• Two numbers written in a certain order.

Parallel line

• A line segment that is evenly spaced.

Perpendicular

• At right angles.

Perpendicular bisector

• A line that cuts a line segment in two parts at 90 degrees.

Preimage

• f is a function from domain X to codomain Y. The smaller oval inside Y is the image of f.

Reflection

• The throwing back by the surface of light.

Reflex angle

• More than 180 degrees but less than 360 degrees.

Right angle

• Exactly 90 degrees.

Rotation

• A circular motion around a point.

Sector

• A pie shaped part of a circle.

Straight angle

• Exactly 180 degrees

Supplementary angles

• The two angles of 140 degrees and 40 degrees.

Transformation

• A dramatic change in apperence.

Translation

• Every point is a constant distance.

Transversal

• A line that passes through two lines in the same plane at different points.

Vertex

• A point that describes the corners or intersections of geometric shapes.

Vertical angles

• An angles opposite each other when two lines cross.