The sine of an angle in a right triangle is opposite/hypotenuse, where opposite is the only side that is not adjacent to the angle you want to find the sine of, and the hypotenuse is the side opposite the right angle in the triangle. Just find opposite/hypotenuse.
It is the longest side of a right angle triangle.
If it's a right angle triangle then use Pythagoras' theorem to find the hypotenuse. If it's not then more information is needed such as an interior angle.
For a right angle triangle:- hypotenuse = adjacent/cosine or hypotenuse = opposite/sine
By using trigonometry
The sine of an angle in a right triangle is opposite/hypotenuse, where opposite is the only side that is not adjacent to the angle you want to find the sine of, and the hypotenuse is the side opposite the right angle in the triangle. Just find opposite/hypotenuse.
The 90 degree angle in a right angle triangle is opposite its hypotenuse.
It is the longest side of a right angle triangle.
You can't as there is no hypotenuse in an equilateral triangle. The hypotenuse is the side of a triangle which is opposite a right angle (90°); all angles in an equilateral triangle are 60°.
If it's a right angle triangle then use Pythagoras' theorem to find the hypotenuse. If it's not then more information is needed such as an interior angle.
For a right angle triangle:- hypotenuse = adjacent/cosine or hypotenuse = opposite/sine
The total of the three interior angles in a triangle is 180 degrees. if you know two of the angles, subtract them from 180 and that gives you the third angle.
hypotenuse.
By using trigonometry
No dimensions have been given but to find the hypotenuse of a right angle triangle use Pythagoras' theorem.
The only triangle that has a hypotenuse is a right-triangle. The hypotenuse is the side opposite the right angle, so the angle is always 90 degrees. In this case, if you're just finding the angle then you don't need to know what the side lengths are.
It is the angle opposite the hypotenuse which measures 90 degrees