Current location - Training Enrollment Network - Mathematics courses - 20 18 why is △ABC a right triangle in the process of solving the 25 th question of the mathematics test for the senior high school entrance examination in Shaanxi? Please ask the master for advice.
20 18 why is △ABC a right triangle in the process of solving the 25 th question of the mathematics test for the senior high school entrance examination in Shaanxi? Please ask the master for advice.
Three points A (-2,0 0) B (4 4,0) C (1, 3) so ab=6, bc=ac=3√2, so △abc is a right triangle, so the circumscribed circle radius =ab/2=3, and the center coordinate is (1,3.