ANGLES
Right Angles
Angles with 90°
part of a line that has a starting point but no end.
RAY
Have the same measure.
75° ANGLE
Acute
Acute Angles
Angles less than 90°
• is straight (no bends), and extends in both directions without end (infinitely).
LINE
__________ are the angles opposite each other when two lines cross
VERTICAL ANGLES
90° Angle
right
Obtuse Angles
Angles more than 90° less than 180°
two lines in the same plane that are at equal distance from each other and never meet are:
PARALLEL LINES
Two angles are ________ when they have a common side and a common vertex
ADJACENT
Obtuse
Straight Angles
Angles 180°
two lines that meet or intersect each other at right angles (90°) are:
PERPENDICULAR LINES
Two angles are ___________ when they
add up to 180 degrees
SUPPLEMENTARY ANGLES
Angle of 50° + Angle of 40°
Complementary
Reflex Angle
More than 180° Less than 360.
When two or more lines cross each other in a plane, they are called:
INTERSECTING LINES
Two angles are _____________ when they
add up to 90 degrees
COMPLEMENTARY ANGLES
Angle of 60° + Angle of 120°
Supplementary