GEOMETRY UNIT 1 VOCABULARY. CONGRUENT SAME SIZE, SAME SHAPE.

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Presentation transcript:

GEOMETRY UNIT 1 VOCABULARY

CONGRUENT SAME SIZE, SAME SHAPE

SIMILAR SAME SHAPE, DIFFERENT SIZE

LINE SYMMETRY A LINE THROUGH A FIGURE THAT MAKES EACH SIDE A MIRROR IMAGE OF THE OTHER SIDE

ROTATIONAL SYMMETRY A FIGURE CAN BE TURNED 180 DEGREES OR LESS AND STILL LOOKS THE SAME

MIDPOINT A POINT ON THE MIDDLE OF A LINE SEGMENT (IT’S AN AVERAGE OF THE TWO ENDPOINTS )

SLOPE RISE OVER RUN (SUBTRACT THE Y’S, THEN SUBTRACT THE X’S)

PARALLEL LINES THAT NEVER INTERSECT AND HAVE THE SAME SLOPE

PERPENDICULAR LINES THAT INTERSECT TO FORM RIGHT ANGLES; THEIR SLOPES ARE NEGATIVE RECIPROCALS

POINT JUST A DOT; NAMED WITH A SINGLE CAPITAL LETTER

LINE MADE UP OF MANY POINTS; GOES ON FOREVER

PLANE A FLAT SURFACE; HAS LENGTH AND WIDTH

LINE SEGMENT A PART OF A LINE, WITH 2 ENDPOINTS

PERIMETER THE SUM OF THE LENGTHS OF ALL THE SIDES OF A FIGURE

AREA DIVIDING A LINE SEGMENT, ANGLE OR FIGURE INTO 2 CONGRUENT PARTS

BISECTING DIVIDING A LINE SEGMENT, ANGLE OR FIGURE INTO 2 CONGRUENT PARTS