Question

Helpppppp plsssssssss

Answer 1

The correct answer is option C. 3√5

Explanation:

Points to remember

For a right angled triangle

Hypotenuse ² = Base² + Height²

From the attached figure we can see a square and a right angled triangle associated with the square.

Sides of square = 6

To find the value of x

Base = 3 and height = 6

Hypotenuse = x

x² = 3² + 6²

= 9 + 36 = 45

x = √45 = 3√5

Therefore the correct answer is option C. 3√5

Answer 2

C

Explanation:

The right triangle on the right side of the figure has a height of 6 (two same sides lengths) and a base of 3.

x is the hypotenuse (side opposite of 90 degree angle).

We can use the pythagorean theorem to find x. The pythagorean theorem tells us to square each leg (height and base) of the triangle and add it. It should be equal to the hypotenuse square.

For this triangle it means, we square 6 and 3 and add it. It should be equal to x squared. Then we can solve. Shown below:

`6^2 + 3^2 = x^2\\36 + 9 = x^2\\45 = x^2\\x=√(45)`

Now we can use property of radical
`√(x)√(y)  =√(x*y)` to simplify:

`x=√(45) \\x=√(5*9) \\x=√(5) √(9) \\x=3√(5)`

Correct answer is C