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Geometry C5

Geometry C5 Congruent Triangles

TermDefinition
interior angles angles of a polygon
exterior angles angles that form linear pairs with the interior angles of a polygon
triangle a plane figure with three straight sides and three angles
corresponding parts a pair of sides or angles that have the same relative position in two congruent figures
congruent figures geometric figures that have same size and same shape
rigid motion a transformation that preserves length and angle measure
legs two congruent sides of an isosceles triangle
vertex angle the angle formed by the legs of an isosceles triangle
base the side of an isosceles triangle that is not one of the legs
base angles the two angles adjacent to the base of an isosceles triangle
hypotenuse the side opposite the right angles of a right triangle
construction a geometric drawing that uses a limited set of tools, usually a compass and a straightedge
scalene triangle triangle with no congruent sides
isosceles triangle triangle with at least two congruent sides
equilateral triangle triangle with three congruent sides
acute triangle triangle with three acute angles
right triangle triangle with one right angle
obtuse triangle triangle with one obtuse angle
equiangular triangle triangle with three congruent angles
Triangle sum Theorem the sum of the measures of the interior angles of a triangle is 180 degrees
Exterior Angle Theorem the measure of an exterior angle of a triangle is equal to the sum of the measures of the two nonadjacent interior angles
Created by: shelleypruit
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