In Fig. 15.80, ABCD is a trapezium in which AB||DC. Prove that ar(Δ AOD) = ar(Δ BOC).
Given that,
ABCD is a trapezium with AB ‖ DC
To prove: Area ( = Area (
Proof: Since,
ΔABC and ABD are on the same base AB and between the same parallels AB and DC
Therefore,
Area (Δ ABC) = Area (Δ ABD)
Area (Δ ABC) – Area (Δ AOB) = Area (ΔABD) – Area (Δ AOB)
Area (Δ AOD) = Area (Δ BOC)
Hence, proved