May someone please help me with my homework please it is very important

1. are the triangles similar and if so why? what is the value of x? show your work.

The radius of the circle is 4 cm and the measure of the central angle is 90° the area of the sector with a central angle measuring 90° and radius of length 4 cm is vt cm the triangle in the sector is 4 cm the area of the triangle is v/cm² the area of the segment of the circle is (471 - ) cm?

W-16=-12 solve each one step equation plz