Answer:
Option B, 17m
Step-by-step explanation:
The figure is divided in two triangles. Both triangles are right triangles. To find the lengths, use Pythagorean Theorem (since its a right angled triangle).
Pythagorean Theorem states: A² + B² = C²
A and B could be the sides adjacent to the right angle (the legs of the triangle)
C always has to be the hypotenuse, the side opposite to the right angle.
In this situation we are given both the legs and have to find the hypotenuse.
⇒ A² + B² = C²
⇒ 8² + 15² = Wall Brace²
⇒ 64 + 225 = Wall Brace²
⇒ 289 = Wall Brace²
⇒ [tex]\sqrt{289} = \sqrt{Wall Brace^{2} }[/tex]
⇒ 17 = Wall Brace
Hope this helps!
