GEOMETRY 101

PARALLEL LINES

• MEET TO FORM RIGHT ANGLES

• NEVER MEET

• MEET TO MAKE Vs

PERPENDICULAR LINES

• NEVER MEET

• INTERSECT TO MAKE Vs

• MEET AT 90*

• FORM ACUTE ANGLES

ACUTE ANGLES MEASURE

• EXACTLY 180*

• EXACTLY 90*

• LESS THAN 90*

• MORE THAN 90* BUT LESS THAN 180*

RIGHT ANGLES MEASURE

• 180*

• 90*

• LESS THAN 90*

• MORE THAN 90* BUT LESS THAN 180*

STRAIGHT ANGLES MEASURE

• 90*

• 180*

• LESS THAN 90*

• MORE THAN 90* BUT LESS THAN 180*

OBTUSE ANGLES MEASURE

• EXACTLY 90*

• LESS THAN 90*

• MORE THAN 90* BUT LESS THAN 180*

• EXACTLY 180*

WHICH ONE GOES ON FOREVER IN ONE DIRECTION?

• LINE

• RAY

• LINE SEGMENT

• ANGLE

A __________ GOES ON FOREVER IN TWO DIRECTIONS (2 ARROWS).

• RAY

• LINE SEGMENT

• LINE

• ANGLE

WHICH 2 QUADRILATERALS ARE COMPOSED OF ALL 90* ANGLES?

• square and rhombus

• square and trapezoid

• rectangle and paralleogram

• rectangle and square

A __________ has only 1 set of parallel sides.

• triangle

• square

• trapezoid

• rectangle