The poet suggests that we should build strong houses and fix the doors firmly to make friends with the wind. Moreover, we should be strong enough to face the difficulties in life.
In Fig. 9.26, A, B, C and D are four points on a circle. AC and BD intersect at a point E such that ∠ BEC = 130° and ∠ ECD = 20°. Find ∠ BAC.