Geometry A Unit 4 Flashcards
Altitude of a Triangle
A segment from a vertex perpendicular to the opposite side.
Base Angle
The two angles that include the base of an isosceles triangle.
Base of an Isosceles Triangle
The third, unequal side of an isosceles triangle
Base of a Trapezoid
The parallel sides of a trapezoid.
Congruent Figures
If a one-to-one correspondence between the parts of two figures is such that the corresponding parts are equal, then the figures are congruent.
Corresponding Angles
Angles paired with one another in a one-to-one correspondence between geometric figures.
Corresponding Sides
Sides paired with one another in a one-to-one correspondence between figures.
Included Angle
The angle formed by two sides of a triangle.
Included Side
The side of a triangle formed by the common side of two angles.
Isosceles Trapezoid
A trapezoid with both legs of the same length.
legs of a trapezoid
The nonparallel sides of a trapezoid.
median of a trapezoid
The segment connecting the midpoints of the legs.
median of a triangle
A segment from a vertex to the midpoint of the opposite side.
one-to-one correspondance
The situation when each member of a set, such as angles of a triangle, can be paired with one and only one member of another set.
parallelogram
A quadrilateral with both pairs of opposite sides parallel.
