Question

Belinda has made a lampshade with area 03
Its shorter arc has length 1 m, and its slant het
10
is 28 cm.
0.32 m2
28 cm
1m
Suppose the material is cut as the difference between two
sectors with common angle 8°, and radii r and R.
a Show that the area of the lampshade is given by
0.280
7 (2r +0.28) m?
360
b Use the smaller sector to show that A =
180
( Find r and A.
R
r
TT
00
d Hence find the length of the longer arc.​

Answer 1

Answer:

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