An angle is formed where two lines meet. Parallel lines do not meet. Therefore they do not form an angle. So there is no angle to have a name. So no name.
They are called perpendicular.
An angle greater than 90 degree is an obtuse angle.
A right angle
complete angle
An angle is formed where two lines meet. Parallel lines do not meet. Therefore they do not form an angle. So there is no angle to have a name. So no name.
That's the "vertex" of the angle.
They are called perpendicular.
Oh honey, that's an easy one. Another name for a right angle DEF is a 90-degree angle. It's like the perfect L shape, straight up and down, no funny business. So, go ahead and call it a 90-degree angle or a right angle, whatever floats your boat.
An angle greater than 90 degree is an obtuse angle.
An acute angle
A right angle
Acute angle
A right angle
complete angle
A right angle
if the two line intersect at 90 degree then these are called perpendicular lines