Ch- name algebraic expressions and identities (1) multiply. (x+a)and(x+b)​

Which statement best describes the polynomial

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?

If angle 2=3x +1 and angle 3=2x +4what is angle 2