True. A right angle is 90o so the lines which form it must be mutually perpendicular.
Every isosceles or equilateral triangle.
Every point on the bisector of an angle is equidistant from the sides of that angle. It is understood that the distance of a point from a line is the length of the perpendicular dropped from the point to the line.
Every meridian of longitude is perpendicular to every parallel of latitude, and every parallel of latitude is perpendicular to every meridian of longitude.
It's not that easy to answer because a straight angle is like a straight line and I think that it would be on either every or none of the shapes that I would know of. Any shape has a right, obtuse,or acute angle. So, I am guessing that no shapes have straight angles. or that a straight angle is in every angle which is not true.
Not every triangle has to have an obtuse angle.
2
NO, because each intercecting line does not make a right angle-some could make acute or obtuse angles. To be perpendicular the lines that meet have to make a right angle(90 degree angle) or else they will not be perpendicular.
the opposite of parallel lines are Perpendicular. A perpendicular angle or line is where there is a 90 degree on each and every side.
Two lines are said to be perpendicular when they are at right angles. That means that the angle between them is 90 degrees.There are other meanings of perpendicular; for example, a line is said to be perpendicular to a plane when it is perpendicular to EVERY line of the plane that goes through the intersection.
Every isosceles or equilateral triangle.
Every point on the bisector of an angle is equidistant from the sides of that angle. It is understood that the distance of a point from a line is the length of the perpendicular dropped from the point to the line.
hmm... i am not sure i understand your question, sounds like a yes!! The bisector of an angle is the line or line segment that divides the angle into two equal congruent parts. The angle bisectors meet at the incenter to bisect the angle.
Every meridian of longitude is perpendicular to every parallel of latitude, and every parallel of latitude is perpendicular to every meridian of longitude.
The height is a perpendicular angle from the base. The sides of the parallelogram are slanted tho and this will vary for every parallelogram. To find the height you typically make a triangle with one of the slanted sides.
It's not that easy to answer because a straight angle is like a straight line and I think that it would be on either every or none of the shapes that I would know of. Any shape has a right, obtuse,or acute angle. So, I am guessing that no shapes have straight angles. or that a straight angle is in every angle which is not true.
False
Not every triangle has to have an obtuse angle.