1.In a parallelogram ABCD, AB= 8cm. The altitudes corresponding to sides AB and AD are respectively 4cm and 5cm. Find the measure of AC.
2.In a parallelogram ABCD,P is the mid point of BC and P is connected to A and D.If the area of the parallelogram is 80cm², then find the area of ΔADP.
3.ΔABC and ΔDBC are two triangles on the same base BC and between the parallel lines m and n at the top and bottom respectively.If AB=3cm, BC=5cm, angle A= 90 degree, find the area of Δ DBC.
Please kindly answer all the questions with explanation.
It is very urgently needed..........