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Trev - 6th grade geometry terms
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geometry terms for 6th grade
Terms in this set (46)
a closed figure with at least three sides is
a polygon
a closed figure with three sides is a
triangle
a closed figure with 4 sides is a
Quadrilateral
a closed figure with 5 sides is a
pentagon
a closed figure with 6 sides is a
hexagon
a closed figure with 8 sides is
octagon
A __________ is used to draw and measure angles
protractor
line
a straight path that extends WITHOUT END in opposite directions
point
an exact location
line segments
a part of a line that stops in both directions
ray
a part of a line that extends in one direction but stops in the other
plane
a flat surface that extends without end in all directions
an _____ is formed by 2 ____ with a common point A.K.A _____
angle ; rays ; vertex
name the 4 angles
obtuse, acute, straight, right
obtuse angles are ________ than 90
greater
acute angles are ________ than 90
less
right angles are ________ than 90
exactly
straight line are _______ degrees
180
intersecting lines
lines that cross at one common point
parallel lines
lines in the same plane that never intersect
perpendicular lines
intersect to form right angles
complementary angles
add up to 90
supplementary angles
add up to 180
adjacent angles
next to
vertical angles are
opposite equal
is this always ,sometimes or never true: a line is longer than a line segment. why
always ,a line segment is part of a line
name the 6 types of triangles
acute, obtuse, right, scalene, isosceles, equilateral
what is an acute triangle
all acute angles
what is an obtuse triangle
1 obtuse angle
what is a right triangle
1 right angle
what is a scalene triangle
all different lengths
what is an isosceles triangle
2 same length 1 different
what is an equilateral
all same lengths
name the 5 quadrilaterals
parallelogram, rectangle, square, rhombus, trapezoid
what is an parallelogram
vertical sides and angles are congruent
what does congruent mean
same
what is a rectangle
parallelogram with 4 right angles
what is a rhombus
parallelogram with 4 congruent sides
what is a square
rectangle with 4 congruent sides
what is a trapezoid
quadrilateral with only on set of parallel lines; may have 2 right angles
is a square a rectangle, or a rectangle a square
square a rectangle
all rectangles are also
parallelograms
a rhombus is sometimes
square
all trapezoids are
quadrilateral
a ______ is any plane figure with four straight sides and four angles.
quadrilateral
a quadrilateral with two sets of parallel lines, but does not have 90 angles are called
rhombus/parallelogram
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