As shown in the figure, triangle ABC is a right triangle, quadrilateral aefd is a square, BF is 77cm, FC is 52cm, find the area sum of a and B When the picture was finished, we couldn't get it out. Angle a is a right angle, a is a triangle, CDE and B is Feb,

As shown in the figure, triangle ABC is a right triangle, quadrilateral aefd is a square, BF is 77cm, FC is 52cm, find the area sum of a and B When the picture was finished, we couldn't get it out. Angle a is a right angle, a is a triangle, CDE and B is Feb,

Area sum of a and B = 52 × 77 / 2 = 2002 (area unit) & nbsp; [see figure, a and B form a right triangle, right side length 52,77]