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Question

Question

Adaxiang2003

P6 Mathematics

Question post on Wed, 03/05/2017 7:52am

Please help above question. Tks!

Source: Rosyth

Answer

BigDevil · Answer 1 · Post on Wed, 03/05/2017 9:19am

BigDevil Post on Wed, 03/05/2017 9:19am

BigDevil · Answer 2 · Post on Wed, 03/05/2017 9:19am

BigDevil

Post on Wed, 03/05/2017 9:19am

Adaxiang2003 · Answer 3 · Post on Wed, 03/05/2017 5:25pm

Adaxiang2003 Post on Wed, 03/05/2017 5:25pm

Very appreciate

alfretztay · Answer 4 · Post on Thu, 04/05/2017 5:59pm

I would solve the question as follows :

area of square ——- 19 x 19 = 361
area of quadrant ——- (1/4) x pi x 19 x 19 = 90.25pi
area of semi circle ——- (1/2) x pi x (19/2) x 19/2) = 45.125pi
area of shaded part ——- 90.25pi – 45.125pi + (361 – 90.25pi)/2 = 180.50

Ans : 180.50 sq cm.