# Flashcards - FTCE Math: Lines & Angles

Flashcards - FTCE Math: Lines & Angles
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right triangle
A right triangle or right-angled triangle is a triangle in which one angle is a right angle
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Pythagorean theorem
In mathematics, the Pythagorean theorem, also known as Pythagoras's theorem, is a fundamental relation in Euclidean geometry among the three sides of a right triangle
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line segment
In geometry, a line segment is a part of a line that is bounded by two distinct end points, and contains every point on the line between its endpoints
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right angle
In geometry and trigonometry, a right angle is an angle that bisects the angle formed by two adjacent parts of a straight line
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Parallel lines
In geometry, parallel lines are lines in a plane which do not meet; that is, two lines in a plane that do not intersect or touch each other at any point are said to be parallel
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constant
The number e is an important mathematical constant that is the base of the natural logarithm
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constant
The number e is an important mathematical constant that is the base of the natural logarithm
Parallel lines
In geometry, parallel lines are lines in a plane which do not meet; that is, two lines in a plane that do not intersect or touch each other at any point are said to be parallel
right angle
In geometry and trigonometry, a right angle is an angle that bisects the angle formed by two adjacent parts of a straight line
line segment
In geometry, a line segment is a part of a line that is bounded by two distinct end points, and contains every point on the line between its endpoints
Pythagorean theorem
In mathematics, the Pythagorean theorem, also known as Pythagoras's theorem, is a fundamental relation in Euclidean geometry among the three sides of a right triangle
right triangle
A right triangle or right-angled triangle is a triangle in which one angle is a right angle
angle
In planar geometry, an angle is the figure formed by two rays, called the sides of the angle, sharing a common endpoint, called the vertex of the angle
congruent angles
In geometry, two figures or objects are congruent if they have the same shape and size, or if one has the same shape and size as the mirror image of the other
vertex
In geometry, a vertex is a point where two or more curves, lines, or edges meet
plane
In mathematics, a plane is a flat, two-dimensional surface that extends infinitely far
transversal
In geometry, a transversal is a line that passes through two lines in the same plane at two distinct points
protractor
A protractor is a measuring instrument, typically made of transparent plastic or glass, for measuring angles
perpendicular
In elementary geometry, the property of being perpendicular is the relationship between two lines which meet at a right angle

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