Question 1112947
  We have a circle with centre m and a diameter of 80 mm. There is a right-angled triangle inside the circle with two vertices on the circumference of the circle and the third vertex at the origin m.the shaded area in the diagram,rounded to one decimal digit is?  
:
Assuming it is the area outside the triangle that is shaded
The radius of the circle, & the two sides of the triangle (base * height) = 40 mm
shaded area = ({{{pi*40^2}}}) - ({{{1/2}}}40*40)
 5026.548 - 1600 = 4226.5