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What does dihedral angle mean?
A dihedral angle is the angle between two intersecting planes.
What is the meaning of the word intersect?
The word "intersect" has 2 meanings. It can mean divide something by passing or lying across it. It can also mean two or more things passing or lying across each other.
What does intersect mean in math terms?
Depends on which intersect you are talking about. I am going to assume you mean where a line intersects the axis in a two dimensional plane. An intersect is the point on the x or y axis where a line crosses it.
What does perpendicular mean in math terms?
It means that two lines intersect each other at a ninety degree angle.
Does to intersect each other mean also to bisect each other?
No. If two lines intersect they cross each other. To bisect each other, means that the lines not only intersect but that also that the point where the two line[ segment]s cross is the mid point of both of the line[ segment]s. Examples, consider: The diagonals of a kite ABCD with sides AB & AD equal (2 cm each), and BC & DC equal and twice the length of the other two sides (4 cm each). The diagonals AC and BD intersect each other; BD is bisected by AC but AC is NOT bisected by BD. The diagonals of a right angle trapezium ABCD with ∠DAB and ∠ADC right angles (so sides AB and DC are parallel) and with sides AB = 2 cm, CD = 14 cm and AD = 5 cm (side BC = 13 cm). The diagonals AC and BD intersect, but NEITHER bisects the other. The diagonals AC and BD of a square ABCD not only intersect each other, but they also do, in this case, bisect each other.
