Current location - Training Enrollment Network - Mathematics courses - Math problem 1 1 How to do it?
Math problem 1 1 How to do it?
You have calculated the area of the triangle.

Area of circle = square of radius.

= x 1^2

=3. 14

A = 90 degrees B = 60 degrees. C = 30 degrees

A+? B+? C = 180 degrees, which is exactly equal to the area of half a garden.

Shadow area = whole triangle-semicircle area

= 4.43 (square centimeter) Answer