10 (option A)
Step-by-step explanation:
Triangle is right angled. So we would apply pythagoras' theorem to find the third side.
Hypotenuse² = opposite² + adjacent²
hypotenuse = ?
opposite = 8
adjacent = 6
Inserting into the formula:
Hypotenuse² = 8² + 6²
Hypotenuse² = 64 + 36
Hypotenuse² = 100
square root both sides:
hypotenuse = √100
hypotenuse = 10
The length of the missing side is 10 (option A)