# Flashcards - FTCE Middle Grades Math: Similar & Congruent Triangle Proofs

Flashcards - FTCE Middle Grades Math: Similar & Congruent Triangle Proofs
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perpendicular bisector theorem
In geometry, bisection is the division of something into two equal or congruent parts, usually by a line, which is then called a bisector
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Congruent Triangles
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
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isosceles triangle
In geometry, an isosceles triangle is a triangle that has two sides of equal length
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similar
Two geometrical objects are called similar if they both have the same shape, or one has the same shape as the mirror image of the other
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similar
Two geometrical objects are called similar if they both have the same shape, or one has the same shape as the mirror image of the other
isosceles triangle
In geometry, an isosceles triangle is a triangle that has two sides of equal length
Congruent Triangles
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
perpendicular bisector theorem
In geometry, bisection is the division of something into two equal or congruent parts, usually by a line, which is then called a bisector
angle bisector theorem
In geometry, the angle bisector theorem is concerned with the relative lengths of the two segments that a triangle's side is divided into by a line that bisects the opposite angle
centroid
In mathematics and physics, the centroid or geometric center of a plane figure is the arithmetic mean position of all the points in the shape
triangle proportionality theorem
The intercept theorem, also known as Thales' theorem , is an important theorem in elementary geometry about the ratios of various line segments that are created if two intersecting lines are intercepted by a pair of parallels
circumcenter
In geometry, the circumscribed circle or circumcircle of a polygon is a circle which passes through all the vertices of the polygon
orthocenter
In geometry, an altitude of a triangle is a line segment through a vertex and perpendicular to a line containing the base

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