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It will have an L shape flipped around at the corner. or you can use a protractor or type in Google images 'right angle triangle' they will have an L shape at the corner of the right angled triangle.

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βˆ™ 13y ago
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Q: How do you know when its a right triangle?
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A triangle with one right angle?

A triangle with 1 right angle is a right angle triangle.


How do you know if a triangle is a right triangle?

If it has one 90 degree angle then it is a right triangle.


What shape has three sides that are not equal but have a right angle?

with the three sides you know it will be a triangle, it is a right triangle, it is not an equilateral triangle or an isosceles triangle... so it must be a right scalene triangle


What do you call A triangle with a 90 degrees angle?

Any triangle with a 90 degree angle is called a right triangle.


How do you use pythagaoras theorem?

If you know any two sides of a right triangle, you can calculate the third by Pythagoras' Theorem.If you know any two sides of a right triangle, you can calculate the third by Pythagoras' Theorem.If you know any two sides of a right triangle, you can calculate the third by Pythagoras' Theorem.If you know any two sides of a right triangle, you can calculate the third by Pythagoras' Theorem.


How do you know if a triangle is a right triangle by it's sides?

C2=a2+b2


How do you know when a triangle is 90 degrees?

we know that a triangle is 90 degrees by measuring its length or it can be known as right triangle which measures 90 degrees.


How do you know a triangle in an obtuse triangle?

you know a triangle is obtuse when it is larger than a right angle which is 90 degrees. ex. a clock when it is 12:15 it makes a right angle or 90 degrees.


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It depends on what else you know about the triangle.


Why do they call a triangle a right triangle?

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How do you know if a triangle is a right triangle using the pythagorean therom?

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How do you find the length of a side in a triangle that is not a right triangle?

Use either the Sine or Cosine rules depending on the information you know about the triangle.