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A right angle triangle must have a 90 degree angle and two acute angles.

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9y ago

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What is an acute angle of a shape?

An acute angle is an angle of a shape under 90 degrees, an angle over 90 degrees is called an obtuse angle. hope this helps!:D


What is a shape that has one 90 degrees angle?

A Right Isosceles Triangle is a shape that has one 90° angle. 90 degrees + the other two angles add up to 180 degrees.


What is a shape that is 90 degrees?

It is a right angle


A shape with an angle at 90 degrees?

A right angle triangle. (if it is a triangle)


What shape has an angle measure of 90 degrees?

A right angle triangle.


How do know If a shape is a right angle?

The angle measures 90 degrees.


What is the measure of an angle if the complement of an angle is 75 degrees?

The sum of an angle and its complement is 90 degrees. So the unknown angle must be 90 - 75 = 15 degrees.


What is a shape with a 90 degrees angle?

A square, A rectangle


What must be true for an angle to be a right angle?

It has to be 90 degrees to be a right angle.


Not a shape it has one vertex angle of the vertex is 90 degrees what shape is it?

L shape


Can a right angle be 85 degrees?

No, it must be EXACTLY 90 degrees.


Why is the supplement of an acute angle always obtuse?

An acute angle is an angle that is between 0 and 90 degrees. The supplement of the angle is 180 degrees minus the magnitude of the angle. Since the original angle is greater than 0 degrees, the supplement must be less than 180-0 = 180 degrees. Since the original angle is less than 90 degrees, the supplement must be greater than 180-90 = 90 degrees. Thuis, the supplement measures between 90 and 180 degrees - that is, it is an obtuse angle.