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Here's a list of shapes that need a right angle:
square
rectangle
right triangle
Wiki User
∙ 15y ago
Anonymous
Nerd!!!!
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What must be true for an angle to be a right angle?
It has to be 90 degrees to be a right angle.
Is it true that an obtuse triangle can have a right angle?
In Euclidean geometry, a triangle must be one of these: acute, obtuse, or right. Maybe there is a non-Euclideangeometry for which some obtuse triangles can contain a right angle, but it doesn't happen in Euclidean geometry.
What must you construct before you trisect a right angle?
An equilateral triangle on on of the arms of the right angle.
Why not left angle triangle but right angle triangle?
Because the phrase 'right angle' indicates 90 degrees whereas there is no such angle as a 'left angle'
What kind of aNGLE DOES A RIGHT TRIANGLE HAVE?
A right-angle triangle must have one corner of 90 degrees.
What must be true for an angle to be a right angle?
It has to be 90 degrees to be a right angle.
Is it true that an obtuse triangle can have a right angle?
In Euclidean geometry, a triangle must be one of these: acute, obtuse, or right. Maybe there is a non-Euclideangeometry for which some obtuse triangles can contain a right angle, but it doesn't happen in Euclidean geometry.
If an angle is not acute straight or obtuse it must be what?
It could be a right angle or a reflex angle
What must true statement about a 30 angle and 60 angle triangle?
That it must be a right angle triangle because the 3rd angle must be 90 degrees
What must you construct before you trisect a right angle?
An equilateral triangle on on of the arms of the right angle.
The fiqure must have at least one right angle angle?
triangle
Why not left angle triangle but right angle triangle?
Because the phrase 'right angle' indicates 90 degrees whereas there is no such angle as a 'left angle'
What shapes do not have any right angles or angles greater than a right angle?
Acute triangles. They can have three angles, all less than 90 degrees (total is 180 degrees).Shapes with more than three sides must have angles of 90 degrees or more because the total of their angles must be 360 degrees (quadrilaterals) or more.
What is a shape that must be a 90 degrees angle?
A right angle triangle must have a 90 degree angle and two acute angles.
What kind of aNGLE DOES A RIGHT TRIANGLE HAVE?
A right-angle triangle must have one corner of 90 degrees.
What angles make a right triangle?
One angle must be 90o, which is the right angle. The sum of the other two angles must equal 90o.
How long must a right triangle be?
It can be any length; a right angle triangle just needs to include a right angle somewhere. But length has nothing to do with whether it is a right angle or not.
