Question

In ∆ABC,AD is in altitude and angle A is right angle . if AB=√20,BD=4 then find CD


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Answer 1

Answer:

1 is the answer

Explanation:

apply Pythagoras theorem in triangle ADB

AB squre = AD square + BD sqaure

20=AD SQUARE +16

AD SQUARE=4

AD=2

APPLY GEOMETRIC MEAN FORMULA IN TRIANGLE ABC

AD SQUARE= BD ×DC

4=4×DC

DC=1

Answer 2

Answer:

CD=1cm

The answer is correct according to me