Respuesta :
Answer:
A. 15.
Step-by-step explanation:
9^2 + 12^2
= 81 + 144
= 225.
Taking the square root: we get 15.
The Pythagorean theorem is a basic relationship between the three sides of a right triangle in Euclidean geometry. The missing side length in the given right-angled triangle is 15. Thus, the correct option is A.
What is Pythagoras theorem?
The Pythagorean theorem, sometimes known as Pythagoras' theorem, is a basic relationship between the three sides of a right triangle in Euclidean geometry. The size of the square whose side is the hypotenuse is equal to the sum of the areas of the squares on the other two sides, according to this rule.
Given the two sides of the triangle, therefore, using the Pythagorean theorem, the third side of the triangle can be written as,
x² = 12² + 9²
x² = 144 + 81
x² = 225
x = 15
Hence, the missing side length in the given right-angled triangle is 15. Thus, the correct option is A.
Learn more about Pythagoras' Theorem:
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