1. SEVENTH GRADE MATH. GEOMETRY

2. GEOMETRY LINE- STRAIGHT PATH OF POINTS THAT GOES ON FOREVER IN TWO DIRECTIONS RAY- PART OF LINE IT HAS ONE ENDPOINT AND GOES ON FOREVER IN ONE DIRECTIONS LINE SEGMENT - PART OF A LINE WITH TWO END POINTS PERPENDICULAR LINES- LINES THAT CROSS AND MAKE FOUR RIGHT ANGLES

3. GEOMETRY RIGHT ANGLE- ANGLE MADE BY TWO PERPENDICULAR RAYS AND MEASURING 90 DEGRESD, RIGHT ANGLES CAN ALSO BE MADE BY PERPENDICULAR LINES ACUTE ANGLES-ANGLE LESS THEN 90 DEGRES OBTUSE ANGLE- ANGLE LESS MORE THEN 90 DEGREES CENTRAL ANGLE- ANGLE WHOSE TWO SIDES ORIGINATE AT THE CENTER OF A CIRCLE

4. TRIANGLES ISOSCELES- A TRIANGLE THAT HAS TWO EGUAL SIDES EQUILATERAL- A TRIANGLE WITH ALL SIDES EQUAL