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7.G (Angle Relationships), 7.G (3D Vocab), 7.G (2D Vocab)
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Gravity
Terms in this set (43)
acute angle
An angle that is less than 90 degrees
obtuse angle
An angle that is between 90 and 180 degrees
right angle
An angle that is 90 degrees
180
The angles in a triangle add up to ___________ degrees
complementary angles
Angles that add to 90 degrees
C = complementary = corner (a 90 degree angle makes a corner)
supplementary angles
Angles that add to 180 degrees.
S = supplementary = straight
protractor
A tool used to measure angles
Surface area
Measures the area (aka number of squares) that fit on all the faces of a 3D shape
Volume
Measures the number of cubes that fit inside a 3D shape
Dimensions
The important measurements of a shape
Net
A flattened-out version of a 3D shape.
This is often used to find the surface area.
Vertex (or vertices)
The "points" or "corners" of a shape
A cube has 8 of these
Edge
The part of a 3D figure where 2 faces meet
A cube has 12 of these
Face
The "flat" parts of a 3D figure
A cube has 6 of these
Rectangular prism
What is the name of this 3D shape?
Triangular Pyramid
What is the name of this 3D shape?
Triangular Prism
What is the name of this 3D shape?
Square Pyramid
What is the name of this 3D shape?
Cylinder
A "prism" with a circular base
V=lwh
Formula for the Volume of a Rectangular Prism
V=lwh÷2
(or V=½lwh)
Formula for the volume of a Triangular Prism
V=lwh÷3
(or all pyramids are Area of the Base • Height ÷ 3)
Formula for the Volume of a Rectangular/Square Pyramid
V=lwh÷6
(or all pyramids are Area of the Base • Height ÷ 3)
Formula for the Volume of a Triangular Pyramid
area
Measures the number of squares that fit inside the shape
perimeter
Measures the distance around the outside of the shape
dimensions
The important measurements of a shape
vertex (or vertices)
The "points" or "corners" of a shape
A cube has 8 of these
base
The "bottom" of a shape.
(Though, sometimes it is not actually on the bottom)
height
This picture shows the ________________ of a triangle
polygon
Any closed, 2D shape with straight sides
quadrilateral
A polygon with 4 sides
trapezoid
A polygon with 4 sides and exactly 1 pair of parallel lines
parallelogram
A polygon with 4 sides and exactly 2 pair of parallel lines
pentagon
A 5-sided polygon
hexagon
A 6-sided polygon
octagon
A 8 sided polygon
A=l•w
Formula for the Area of a Rectangle
A=b•h÷2
(or A= ½•b•h)
Formula for the Area of a Triangle
diameter
A line that goes from one side to the other side of a circle, passing through the center
circumference
The perimeter of a circle
radius
A line that goes from the center of a circle to the side
A=πr²
Formula for the area of a circle
C=πd
Formula for the circumference of a circle
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