DEPRECATED Trigonometric functions and side ratios in right triangles

Problem

The diagram below contains parallelogram A, B, C, D and its diagonals start overline, A, C, end overline and start overline, B, D, end overline. The diagonals intersect at point E. m, angle, C, A, B, equals, m, angle, A, C, D, equals, 90, degree.
Which of the equalities must be true?
Choose 1 answer:
Choose 1 answer:
Do 4 problems