The figure below represents a design
on the windows of a building. The
curved part XY is an arc of a circle.
The rise of the segmental arc is 10cm,
its span is 100cm and XZ=ZY=120cm.
calculate:
(i) the radius of the circle
(ii) the area of the segmental cap,
correct to 2 significant figures.
(iii) the total area of the design, correct
to 3 significant figures.
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