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B. Benarrous
Glencoe Bk
1) Angle: Formed by 2 RAYS joined by a VERTEX. (Named by ONE or 3 Letters).
2) Protractor: A TOOL used to MEASURE & draw angles.
3) Right Angle: Measures EXACTLY 90 degrees. (Looks like a BOX in diagrams).
4) Acute: Measures LESS than 90 degrees. (Looks SHARP like a blade).
5) Obtuse: Measures MORE than 90, less than 180. (Looks like a BEACH chair).
6) Angle Bisector: A RAY that cuts an angle into 2 equal angles.
7) Adjacent Angles: Angles that share the same VERTEX & same RAY. (NEXT to each other).
8) Vertical Angles: Angles made from pairs of OPPOSITE rays. (ACROSS from each other).
9) Congruent Ags: Angles with the SAME MEASURE. (Look IDENTICAL).
10) Complementary Ags: Angles that ADD UP to 90 degrees. (Looks like a CORNER).
11) Supplementary Ags: Angles that ADD UP 180 degrees. (Looks like a STRAIGHT line).
12) Perpendicular Lines: Lines that cross to make a RIGHT angle. (Like an INTERSECTION).