Evaluate the numeric expression of 2+14x5-5 what is the answer

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

The area (a) of a circle with a radius of r is given by the formula and its diameter (d) is given by d=2r. arrange the equations in the correct sequence to rewrite the formula for diameter in terms of the area of the circle.

Plzzz answer both questions and i will give you 100 points