(1) which triangles are congruent in the graph? (2) Choose a pair of congruent triangles to prove

(1) which triangles are congruent in the graph? (2) Choose a pair of congruent triangles to prove

(1) (2) taking △ AOB ≌ △ COD as an example, ≌ quadrilateral ABCD is parallelogram, ≌ OA = OC, OB = OD. In △ AOB and △ cod, OA = OC, ≌ AOB = ≌ cod, OB = OD

The logarithm of the two diagonals of a parallelogram dividing the parallelogram into congruent triangles is ()
A. 2 pairs B. 3 pairs C. 4 pairs D. 5 pairs

There are 4 pairs of complete triangle, which are 4 pairs of triangle, there are 4 pairs of complete triangle, there are 4 pairs of triangle, there are 4 pairs of complete triangle, there are 4 pairs of triangle, there are 4 pairs of complete triangle, there are 4 pairs of complete triangle, there are 4 pairs of triangle, there are 4 pairs of complete triangle, there are 4 pairs of complete triangle, there are 4 pairs of complete triangle, there are 4 pairs of complete triangle, there are 4 pairs of complete triangle, there are 4 pairs of complete triatriatriatriatriatriatriatriatriangles, there are △ AOB △ cod, △ abd ≌ CDB ≌ parallelquadriquadriquadriquadriquadriquadriquadriquadriquadriquadriquadrilateral ABCD, △ OA = OC, OC, OC, OB = OC, ob, OB = OC, ob, ob, ob, OB = OC, OB = OC, OB = OC, OB = OC ad = BCAC = AC ABC ≌ CDA, similarly, △ abd ≌ CDB, so C

It is known that the area of parallelogram ABCD is 16, and the diagonal lines AC and BD intersect at point O, then the area of △ cod is______ If M is any point on the edge of CD, then the area of △ mAb is______ ．

The area of ▱ parallelogram ABCD is 16, the diagonal lines AC and BD intersect at point O, and the area of ▱ cod is 14 × 16 = 4. Let the height of ▱ ABCD side AB be h, then the area of ▱ ABCD = ab · H = 16, and the area of ▱ Abe = 12ab · H = 12 × 16 = 8