GEOMETRY PROJECT

Mrs. Choong’s class9/3/10

By. Erica Syptak

Compass - an instrument for determining directions, as by means of a freely rotating magnetized needle that indicates magnetic north.

MIDPOINT- A POINT AT OR NEAR THE MIDDLE OF, OR EQUIDISTANT FROM, BOTH ENDS, AS OF A LINE: THE MIDPOINT OF A BOUNDARY.

Parallel- (of straight lines) lying in the same plane but never meeting no matter how far extended. (of planes) having common perpendiculars.

Right Angle- the angle formed by two radii of a circle that are drawn to the extremities of an arc equal to one quarter of the circle; the angle formed by two

perpendicular lines that intersect; an angle of 90°.

Coplanar - being or operating in the same plane.

Pythagorean Theorem - the theorem that the square of the hypotenuse of a right triangle is equal to the sum of the squares of the other two sides.

COLLINEAR - LYING IN THE SAME STRAIGHT LINE.

Congruent - that two or more things are the exact same size and shape. 

Skew- Neither parallel nor intersecting. Used of straight lines in space.

Perpendicular - an upright position

Distance Formula - The distance d between the points (x1, y1) and

(x 2, y2)

Acute Angle - An angle whose measure is between 0° and 90°

Obtuse Angle - an angle greater than 90° but less than 180°.

Protractor - an instrument having a graduated arc for

plotting or measuring angles.

Endpoint - the point on each side of an interval marking its extremity on that side.

Non-Coplanar - that they do not belong to the same plane

Non-Collinear - that they do not belong to the same line

Line - a continuous extent of length

Ray - one of a system of straight lines emanating from a point.

Angle - the space within two lines or three or more planes diverging from a common point, or within two planes diverging from a common line.

Length of a segment - A straight line which links two points without extending beyond them.