2. The radius of a circle is 7cms. The angle subtended by an arc of the circle at centre is 45º. Find the area of sector.

19.2cm²

Step-by-step explanation:

Given parameters:

Radius of the circle  = 7cm

Angle subtended by the arc  = 45°

Unknown:

Area of the sector = ?

Solution:

To find the area of the sector, use the expression below;

     Area of sector =

where r is the radius ;

 Insert the parameters and solve;

       Area of sector = x x 7²

       Area of sector = 19.2cm²

-14.8

Step-by-step explanation:

if you do add -14.8 to 7.7 your answer will be negative because if you see -14.8 has a higer absolute value.( keep the sign with the higher absolute value). Then when you add you will and get -7.1