Sample Response: Parallel lines never intersect, but they must be in the same plane. The definition does not

require the undefined term point, but it does require

plane. Because they intersect, perpendicular lines must

be coplanar; consequently, plane is not required in the

definition.

What did you include in your response? Check all that

apply.

Parallel lines do not intersect.

O Parallel lines must be coplanar.

Perpendicular lines intersect at one point.

Perpendicular lines intersect so plane is not

required in the definition.

Parallel lines are lines in a similar plane that will never cross and furthermore If that they are in various planes, those lines will never intersect as well. Equal lines never converge, however they should be in a similar plane. The definition doesn't need the unclear term point, yet it requires plane as they cross one another.

While perpendicular lines are two lines that will meet at a right angle which is 90 degree , these lines must be co-planar; therefore, plane isn't needed in the definition.

one centimetre is equal to 0.01 metres

a "theory" a suggestion that is not 100 % accurate, or a figure. some people say its a theory because they of all the passed theory's about one subject. it depends sometimes theory might be accurate and sometimes they are.