The figures are similar. The ratio of the perimeters is 7 : 10. Find x .

Factorize: x^2+8x+10 i just solved it but i don't know if the process is correct

Alex drew a circle with right triangle prq inscribed in it, as shown below: the figure shows a circle with points p, q, and r on it forming an inscribed triangle. side pq is a chord through the center and angle r is a right angle. arc qr measures 80 degrees.

The triangles are similar. what is the value of x? show your work.