Assuming your question is what makes a right-angle, it is an angle of 90o .
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Acute Anglean angle that is less than 90°Right Anglean angle that is 90° exactlyObtuse Anglean angle that is greater than 90° but less than 180°Straight Anglean angle that is 180° exactlyReflex Anglean angle that is greater than 180°
Because a right angle is a right angle.
because a right angle is right and a left angle is wrong
A right angle. i think it's a right angle
The side opposite the right angle of a right angle triangle is the hypotenuse