An art class is painting a mural composed of square blocks on their classroom wall. Each square block
is designed as shown in the diagram.

Part A
the outside border of each square block is covered with blue paint. How many square inches are covered bye blue paint?

Part B
The entire will be made of 25 indetical blocks. How many square inches of the entire mural will be covered by white paint?

Answer: d. 39 cmin the diagram, the approximate length of the minor arc de is 39 centimetres.step-by-step explanation: the formula for the length of an arc in a circle is as displayed below.let the length of the minor arc de = xx = 2( pi )r × angle of sector / 360°from this, we will substitute the values given from the problem into the formula to obtain the length of the minor arc de.x = 2( pi )r × angle of sector / 360°r = radius = 25cmpi as an approximate value = 3.14angle of sector = 120°x = 2( 3.14 )( 25 ) × 120° / 360°x = 157 × 1 / 4x = 39.25x = 39 ( rounded to the nearest whole number as an approximate value )