Question

8 find the missing length

Answer 1

The answer is c) 15

Answer 2

Answer:

C) 15m

Step-by-step explanation:

Since this is a right triangle (we know this since the box in the top left of the image shows that angle is 90°) We can use the pythagorean theorem.

formula for the pythagorean theorem = a² + b² = c²

The easiest way to think about this is to just know that the long side (our missing side in this case) is "c."

So, we plug our numbers in: (it doesn't matter which legs of the triangle you use for "a" or "b")

9² + 12² = x²

9² = 81

12² = 144

81 + 144 = 225

now we know the missing side (squared) is 225. All we need to do is just find the square root ($\sqrt$) of 225.

$\sqrt{225}$ = 15

15 is your answer.