Question

??help me how to do this

Answer 1

`\large\boxed{x=√(7^2+4^2)=√(65)}`

Explanation:

Use the Pythagorean theorem:

`leg^2+leg^2=hypotenuse^2`

We have

`leg=7,\ leg=4,\ hypotenuse=x`

Substitute:

`x^2=7^2+4^2\to x=√(7^2+4^2)`

`x=√(49+16)\\\\x=√(65)`

Answer 2

x = sqrt( 4^2 + 7^2)

Explanation:

They want the equation to solve the triangle

We can use the Pythagorean theorem

a^2 + b^2 = c^2

where a and be are the legs and c is the hypotenuse

4^2 + 7^2 = x^2

Take the square root of each side

sqrt(4^2 + 7^2) = sqrt(x^2)

sqrt( 4^2 + 7^2) = x