9. Find the area of the unshaded portion.
S
12 cm
R
4 cm
M
12 cm
P
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Answer:
area of shaded region = 1/2×b×h
= 1/2×12 ×4
= 2 ×12
= 24 cm²
area of given figure = 12 ×12
= 144 cm²
now area of unshaded portion
= 144 - 24
= 120 cm²
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