Question

A sector of a circle subtends an angle of 105° at the centre of the circle calculate the perimeter and area of the circle

Answer 1

Missing data.

If the radius is r
the perimeter of a circle is 2πr
the area of a circle is π r^2

Your sector is 105/360 or 7/24 of the area
and the arc length of your sector is 7/24 of the perimeter

Answer 2

I are mad👹