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Mensuration Practice Test 8
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© examsnet.com
Question : 5
Total: 40
Find the area of a triangle whose sides are 40 m, 38 m and 60 m respectively.
746.18 sq. m
744.18 sq. m
747.18 sq. m
750.19 sq. m
Validate
Solution:
a = 40, b = 38, c = 60
S =
a
+
b
+
c
2
=
40
+
38
+
60
2
=
138
2
= 69
A =
π
r
2
or
√
s
(
s
−
a
)
(
s
−
b
)
(
s
−
c
)
√
69
(
69
−
40
)
(
69
−
38
)
(
69
−
60
)
=
√
69
×
29
×
31
×
9
=
√
3
×
23
×
29
×
31
×
3
×
3
=
3
√
62031
= 3 249.06 = 747.18 sq.m
© examsnet.com
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