Could someone please help me with this question

Answer:
10 units
Step-by-step explanation:
Area of a triangle is [tex]\frac{h*b}{2}[/tex]= Area
where h is the height, and b is the base
We can substitute these values into the area equation and get:
[tex]\frac{x*10}{2} = 50[/tex]
Multiply both sides by 2:
x * 10 = 100
Divide both sides by 10:
x = 10
The missing side is 10 units long