Question

Please ans the second question
Will mark as brainliest

Answer 1

If we draw a complete circle then

angle AOB=m(arcAB) (Definition of measure of minor arc)

radius OA=radius OB=4.2

m(arc AB )=90

perimeter of a semicircle is pie r

value of pie is 22/7 or 3.14

22/7×4.2=13.2

Perimeter of a circle = semicircle ×2

= 13.2×2

=26.4

Perimeter of the figure = Perimeter of the circle - measure of arc AB

26.4 - 90=63.6

Therefore , the perimeter of the figure is 63.6

Answer 2

Answer:

59.4cm

Step-by-step explanation:

Hope this helps! :)) Please mark as brainliest thanks!