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Geometry Vocab
Some of the terms for geometry
16
Mathematics
8th Grade
04/05/2010

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Term
[image]
Definition
a quadrilateral with four right angles and two pairs of parallel sides
Term
[image]
Definition
a quadrilateral with opposite sides that are parallel and equal and opposite angles that equal
Term
[image]
Definition
a parallelogram with four equal sides and opposite equal angles
Term
[image]
Definition
a quadrilateral that has two sets of equal sides and one set of opposite equal angles
Term
Area
Definition
The size the surface takes up measured by square units.
Term
Perimeter
Definition
The distance around the outside of a shape_ measured in linear units like centimeters, inches, feet, miles, etc.
Term
Circumference
Definition

C for circle.

The distance around a circle 

the outside of the circle.

Term
Diameter
Definition

The straight line going all the way across the middle of the

circle.

Term
Radius
Definition
A straight line going from the middle of the circle to the outside.
Term

[image]

Obtuse

Definition
Greater than 90º
Term

[image]

Scalene triangle

Definition
No sides equal
Term
[image]Acute triangle
Definition
Means less than 90º- could be a triangle or an angle
Term

[image]

Equilateral triangle

Definition
Triangle with equal sides and equal angles.
Term

[image]

Isosceles

Definition
Triangle with two equal sides and two equal angles.
Term

[image]

Right triangle

Definition
 A triangle that has a right angle is a __________________
Term
180º
Definition
If you add the degrees of the angles in a triangle you would get this number!
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