Question

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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Answer 1

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