If a transversal intersects two parallel lines, then corresponding angles are congruent. CORRSEPONDING ANGLES POSTULATE.

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Presentation transcript:

If a transversal intersects two parallel lines, then corresponding angles are congruent. CORRSEPONDING ANGLES POSTULATE

All right angles are congruent. THEOREM 2-4

THEOREM (Area of a circle) The are of a circle is the product of π and the square of the radius. A=πr^2 r

TRIANGLE Three sided figure whose angles add to be 180.

ISOSCELES TRAPEZOID Quadrilateral with one pair of parallel sides whose legs are congruent.

CIRCLE Set of all points in a plane that are a given distance, the radius, from a given point, the center.

CONE 3D figure with a circular base, a vertex not in the plane of the surface, and a curved lateral surface.

CYLINDER 3D figure with two congruent circular bases that lie in similar planes.

SUPPLEMENTARY ANGLES Pairs of angles that add to equal 180 degrees.

REFLECTION When a shape is flipped across a line and faces the opposite direction

ALTITUDE OF A TRIANGLE Perpendicular segment from a vertex to the line containing the side opposite that vertex.

TRANSLATION Transformation that moves points the same distance and in the same direction.

CENTROID OF A TRIANGLE The point of intersection of the medians of the triangle.

OBTUSE ANGLE Angle whose measure is more than 90 degrees and less than 180 degrees.

RADIUS Any segment with one endpoint on the circle and the other endpoint at the center of the circle.

SKEW LINES Lines that do not lie on the same plane and will never intersect.

INDIRECT MEASUREMENT Way of measuring things that are difficult to measure directly by measuring the distances shown and using proportions of similar figures you can find measurements.

VERTICAL ANGLES Two angles whose sides form opposite rays. Vertical angles congruent.

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