7(3.5+2)+8(9.3-7) please help​

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?

What are different types of statistical programs

Can someone me out here and the tell me the greatest common factor