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# 8th CCSSM GEO PT 1

### 8th GEOMETRY COMMON CORE PART 1 - COMPLETE

TermDefinition
line of reflection the line in which a figure is flipped when the figure undergoes a reflection
center of rotation The point about which a figure is turned when a figure undergoes a rotation.
clockwise Moving in the direction of the hands on a clock.
counterclockwise Moving in the opposite direction to the hands on a clock.
congruence ≅, figures that are exactly the same shape and size
dilations To resize something. In general English it means to make larger., but in Mathematics it means to make larger or smaller.
image a representation of the external form of a person or thing in art
exterior angle The angle between any side of a shape, and a line extended from the next side.
interior angle An angle inside a shape
alternate interior angles When two lines are crossed by another line (which is called the Transversal), the pairs of angles, on opposite sides of the transversal, but inside the two lines
angle-angle criterion when two pairs of corresponding angles of two triangles are equal, the triangles are similar.
deductive reasoning A form of reasoning by which each conclusion follows from the previous one; an argument is built by conclusions that progress towards a final statement.
adacent Lying next to each other.
complementary Two Angles are _____________________ when they add up to 90 degrees (a Right Angle) . They don't have to be next to each other, just so long as the total is 90 degrees.
corresponding angles When two lines are crossed by another line (which is called the Transversal), the angles that are in matching corners
legs the two sides of a triangle that meet at a right angle
cone a solid with one circular base
cylinder A solid object with two congruent circular bases that lie in parallel planes
height The vertical distance from top to bottom;
hypotenuse the side of a right triangle that is opposite the right angle; It is also the longest side of the right-angled triangle
Created by: artisteacher