noeminm105
02.12.2021 •
Mathematics
19.
The diagram shows a circle inside a semicircle.
10 cm
20 cm
sont
The circle has a diameter of 10 cm.
The semicircle has a diameter of 20 cm.
Work out the area shaded.
Give your answer correct to 1 decimal place.
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Ответ:
here's your answer mate !
let, ab= height of the light house. bc=horizontal distance from the boat to the lighthouse.
then,in traingle abc
tan60=ab/bc
∛ 25 ÷ bc