Answer 1

Given: (1) ABCD is a trapezium, with parallel sides AB and DC

(2) Diagonals AC and BD intersect at O

To find: Area of ΔAOD equals to ?

Calculation: We know that ,” two triangles with the same base and between the same parallels are equal in area.”

Therefore,

Area of  ΔADB = Area of ΔACB

Area of  ΔAOB  + Area of ΔAOD = Area of  ΔAOB + Area of ΔBOC

Area of  ΔAOD = Area of ΔBOC