hland breadth b. If length 15
wo areas equal?
the value of y for the following triangles.
5 cm
a
3 cm
10 cm
8 cm
(b)
Fig. 15.20
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Step-by-step explanation:
Answer
Two sides length are given, we need to figure out the length of this side.
⇒Let x be length of third side
⇒Perimeter =42 cm
⇒18+10+x=42
⇒x=42−28=14 cm
⇒2s=42
⇒s=21 cm
⇒a=18,b=10,c=14
⇒A=
s(s−a)(s−b)(s−c)
⇒
21(21−18)(21−10)(21−14)
=
21×3×11×7
⇒A=21
11
cm
2
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