The value of x, given that this is a right angled triangle would be 7. 75 cm
How to find the missing side of a right angled triangle ?
In a right-angled triangle, you can use the Pythagorean theorem to find the length of the missing side when you know the lengths of the other two sides.
Use the Pythagorean theorem:
c ² = a ² + b ²
(11.8 cm) ² = (8.9 cm) ² + x ²
(11.8 cm) ² - (8.9 cm) ² = x ²
x ² = 139.24 cm ² - 79.21 cm ²
x ² = 60.03 cm ²
Take the square root of both sides to find the length of side B:
x = √60.03 cm
= 7.75 cm
The length of side B (x) is 7.75 cm.