Download Slide 1 - lowesgeometryprojects

By:
Ashley Elliott
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Conjecture-an unproven statement that is
based on observations.
Distance formula-a formula
for computing the distance
between two points in a coordinate plane.
Angle bisector-a ray that divides
an angle into two adjacent angles
that are congruent.
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Skew lines-lines that are not
coplanar and do not intersect.
Transversal-a line that intersects
two or more coplanar lines at different points.
Corresponding Angles Postulate-If two parallel
lines are cut by a transversal, then the pairs of
corresponding angles are congruent.
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Isosceles triangle-two sides are equal
(congruent). If two sides of a triangle are
congruent, then the angles opposite
these sides are equal.
Equilateral triangle-equiangular.
Isosceles Triangle
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Polygon-2 dimensional closed-form figure
made of non-intersecting line segments.
Diagonal-line from one vertex to the other.
Parallelogram-a quadrilateral with both pairs
of sides parallel.
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Image-the new figure after it is reflected,
rotated, or translated.
Isometry-a transformation that preserves
lengths, angle measures, parallel lines, and
distances between points.
Rotational symmetry-a figure has rotational
symmetry if it can be mapped onto itself by a
rotation of 180 degrees or less.
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Similar polygons-Two polygons such that their
corresponding angles are
congruent and the lengths of
corresponding sides are
proportional.
Proportion-an equation that equates two ratios.
Postulate 25 (Angle-Angle Similarity
Postulate)-If two angles of one triangle are
congruent to two angles of another triangle,
then the two triangles are similar.
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Pythagorean Theorem-In a right triangle, the
square of the length of the hypotenuse is equal
to the sum of the squares of the lengths of the
legs.
Special right triangles-right triangles
whose angle measures are 45-45-90
or 30-60-90.
Trigonometric ratio-a ratio of the lengths of
two sides of a right triangle. The three basic
trigonometric ratios are sine, cosine, and
tangent.
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Central angle-an angle whose vertex
is the center of a circle.
Inscribed polygon-If all the vertices
to a polygon lie on a circle, the
polygon is inscribed in the circle.
Inscribed angle-angle whose vertex is
on the circle and whose sides contain
chords of the circle.
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N-gon- a polygon that has many sides,
specifically n.
Circumference- the distance
around a circle.
Apothem- the height of the triangle between
the center and two consecutive vertices in the
inscribed polygon.
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Polyhedron-a solid that is bounded by
polygons, called faces, that enclose a single
region of space.
Cylinder-a solid with congruent
circular bases that lie in parallel
planes.
Volume of a solid- The number of cubic units
contained in its interior. Volume is measured in
cubic units, such as cubic meters.