The radius of a circle is 4 centimeters. What is the area of a sector bounded by a 180° arc?
r=4 cm
180°
Give the exact answer in simplest form.

8π cm²

Step-by-step explanation:

1. Area of a sector (Degrees)=(Ф/360)*πr²

 Ф= theta

 r=radius

 180/360*π*4²

 1/2*16π

 8π cm²

2. Since the angle is 180°, that means the area is semicircle. The degrees of the whole circle is 360° and half is 180°.

The calculations are still the same.

Area of a semicircle=1/2(πr²)

  1/2 (π*4²)

  16/2 π

  8π cm²

answer: (1,3) and (-2,0) i think.

well the answer to that is xoxoxo

step-by-step explanation: