Current location - Training Enrollment Network - Mathematics courses - Mathematical space and shape in the first volume of the sixth grade find the area of shadow part by splicing and cutting combined shapes (PEP)
Mathematical space and shape in the first volume of the sixth grade find the area of shadow part by splicing and cutting combined shapes (PEP)
180 -90 =90
The triangle and the inner angle of 180. The angle of the sector is 90 degrees.
3. 14×4? =50.24 (unit)
The area of the whole circle.
50.24÷4= 12.56 (unit)
The area of a circle. That is, the area of the shaded part.