Answer:
Angle-side-angle
Explanation:
PQRS is a parallelogram
In statement number 5, to give the reason, you should prove that the given triangles are congruent.
In both triangles PQT and RST we have:
- QT=TS(Diagonals in parallelogram)
- Angle PTQ=angle STR (vertically opposite angles)
- Also PT=TR (Diagonals in parallelogram)
This shows that both triangles are congruent by
S. A. S
Same for the other two triangles.