GeometryBy: Corinne DurocherDecember 24th 2011

7th hour

Table Of Contents• Parallel lines 1• Two Congruent Objects 2• Vertical angles 3• Perpendicular lines 4• Intersecting lines 5• Supplementary angles 6• Corresponding angles 7• Adjacent 8• Obtuse angle 9• Regular polygon 10• Vertex angle 11• Isosceles triangle 12• Right triangle 13• Hypotenuse 14• Pythagoras 15

Parallel Lines- Two lines that lie in the same plane and don’t intersectIf the two masts were not parallel they would not be able to hold the sail up, and they would crash into the other boat.

Two congruent objects- Two objects that have the same angles and sidesIf everyone's sails were not congruent then some boats would go faster or slower than the others and the race would not be fair.

Vertical angles- Two angles whose sides form two pairs of opposite raysIf the sail threads were not made vertical then the sail would not be able to hold under the pressure of the wind.

Perpendicular lines- lines that intersect and form right anglesIf the sails batons were not perpendicular the sail would not fill with wind and it would not be strong and the sail would flop around everywhere.

Intersecting lines- two lines that intersect at one pointIt is important that the lines intersect because the horizontal piece of the mast holds up the side stays which hold up the sail. So without these lines intersecting you could not put up the sail.

Supplementary angles- two angles with the sum of 180If this girl was not at a 180 degree angle the boat would capsize. She is keeping it up by keeping her body straight.

Corresponding angles- angles that lie on the same side of the transversal If angle 1 did not correspond to angle two then the sail would be on the wrong side of the boat.

angle1

Angle 2

Adjacent Two coplanar angles that have a common side and a common vertex but no common interior points.

Obtuse angleAngles that are greater than 90 and less than 180 degrees.

Regular polygonA polygon that is both equilateral and equiangular.

Vertex angleAn angle between and isosceles triangle.

Isosceles triangleA triangle with at least two congruent sides

Right triangleAn angle whose measure is 90 degrees

Hypotenuse A side of a right angle opposite of a right angle

Pythagoras A set of nonzero whole numbers that satisfy the equation

c²=a²+b²