Answer:
[tex]x=25[/tex]
Step-by-step explanation:
If the figures are similar, then the angles are the same. So that means that angle H is equal to angle D (you can count he little arcs in the angle to find it's matching partner). Since this is true:
[tex]4x=100[/tex]
Which is the same as [tex]D=H[/tex]. Solve for x by dividing both sides by 4:
[tex]\frac{4x}{4} =\frac{100}{4} \\\\x=25[/tex]
Finito.
