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Cards (24)
Right
Angle:
90°
Obtuse
Angle: Greater than
90°
but less than 180°
Acute
Angle: Less than
90°
Reflex Angle: Greater than
180°
but less than
360°
Straight
Angle: Equal to
180°
Complementary angles are two angles that add up to
90
degrees.
Supplementary angles are two angles that add up to
180
degrees.
Full rotation:
360
degrees
Equilateral triangle: A triangle whose
sides
are all equal in
length
and angle.
Isosceles triangle: A triangle with at least
one
pair of
congruent
sides.
Right-angled
triangle: A triangle containing an angle measuring exactly
90
degrees.
Scalene triangle: A triangle where no side is
congruent
, so there are
three
different lengths.
Acute triangle: A triangle where all three
interior
angles measure less than
90
degrees.
Parallel
lines: Lines never cross, same
distance
from each other
Perpendicular lines:
Intersect
to form
right
angles
Transversal: Line that
intersects
two or more
parallel lines
Interior
angles: Angles formed by the
transversal
between the
parallel
lines
Alternate interior angles
: Angles on the opposite sides of transversals that lie inside the parallel lines
Corresponding angles: Angles on the
opposite
sides of transversals that have the
same
vertex
Exterior angles: Angles outside the intersection point on the
transversal
Intersecting lines: A line that intersects with another line at a point.
Opposite angles:
two
equal angles formed by
two
intersecting lines.
Adjacent angles: Two angles sharing
one side
, but not necessarily
adjacent
to each other.
Triangles' angles all add up to
180
degrees.