Radius of a circle with centre 'O' is 4.15 cm. AB the diameter of the circle. AE || BC, BC = 8cm .Line EC is tangent to the circle at point D. Find the length of DE.
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Step-by-step explanation:
angle ODE=90
IN TRIANGLE ODE BY PYTHAGORAS THEOREM
OD^2+DE^2=OE^2
96+DE^2=144
DE^2=48
DE=4√3
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