What one should i choose i'm stumped ? ?

Which expression gives the area of the triangle shown below

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?

Write an equation for the function that includes the points (1,4/5) and (2,2/3)