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secondary 3 | E Maths
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This is confusing
Date Posted: 4 years ago
Views: 492
(i)
radius r
r² + (r+12)² = 18²
.
(ii)
tan AOB = 18/r
.
(iii)
area of sector AOB = 0.5 r² θ
where θ is angle AOB in radian
area of triangle OAC = 0.5 . r . 18
shaded region = 0.5 . r . 18 - 0.5 r² θ
.
radius r
r² + (r+12)² = 18²
.
(ii)
tan AOB = 18/r
.
(iii)
area of sector AOB = 0.5 r² θ
where θ is angle AOB in radian
area of triangle OAC = 0.5 . r . 18
shaded region = 0.5 . r . 18 - 0.5 r² θ
.
See 1 Answer
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Hope this helps!
Date Posted:
4 years ago
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