The tree is finally killed when its roots are uprooted and it scorches and chokes in sunlight and air. This process leads to the browning, hardening, twisting and thereby, withering of the roots.
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.