The length of the hypotenuse of a 45°-45°-90° triangle is 12 units. Find the exact value of the length of the leg
This is an isosceles right-angled triangle
Let unknown equal sides be x and x
Using Pythagoras x² + x² = 12²
2x² = 144
x² = 72
x = √72 exactly
or simplified x = 6√2
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