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Angles
Math A2
19
Mathematics
Not Applicable
10/21/2005

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Term
Acute angle
Definition
An angle that is greater than 0 degrees and less than 90 degrees
Term
Right angle
Definition
an angle that is 90 degrees
Term
Obtuse angle
Definition
An angle that is greater than 90 degrees and less than 180 degrees
Term
Straight
Definition
Straight is equal to 180 degrees
Term
Adjacent angles
Definition
Two angles that are next to each other
Term
Complementary angles
Definition
Two angles with the sum of 90 degrees
Term
Supplementary angles
Definition
Two angles with the sum of 180 degrees
Term
Congruent angles
Definition
Angles that are equal to each other
Term
Examples of congruent angles
Definition
Vertical angles,Corresponding angles,
alternate interior angles, alternate exterior angles
Term
Supplementary angles
Definition
Agjacent angles, same side interior angles
Term
What is the sum of interior angles?
Definition
180 degrees
Term
What is the exterior angle is always supplemtary to what?
Definition
The adjacent interior angle
Term
Define isosceles triangle.
Definition
It had two congruent sides and two congruent angles.
Term
What are the congruent angles of an isosceles triangle called?
Definition
Base angles
Term
The third angle of an isosceles triangle is called what?
Definition
Vertex angle
Term
What are the properties of a parallelogram?
Definition
The opposite sides are congruent. The opposite angles are congruent. The opposite are parallel. The same-side interior angles are supplementary.
Term
What are the properties of a rectangle?
Definition
All properties of a parallelogram plus: All angles are congruent and measure 90 degrees. The diagonals are congruent.
Term
What are the properties of a rhombus?
Definition
All properties of a parallelogram plus: All sides are congruent. the diagonals bisect the angles. The diagonals are perpendicular.
Term
What are the properties of a square?
Definition
The square has all the properties a parallelogarm, a rectangle and rhombus.
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