Question

What will be the area of the triangle will sides 3em, 4cm &5 cm
(2) 6 cm² (6) 12 cm² (c) 20sq
(d) 60 cm²​

Answer 1

Answer:

6cm^2

Step-by-step explanation:

Let 3cm be a, 4cm be b &5cm be c.

s=1/2(a+b+c)

=1/2(3+4+5)

=1/2*12

=6 cm

Area of triangle=√s(s-a)(s-b)(s-c)

=√6*(6-3)(6-4)(6-5)

=√6*3*2*1

=√36

=6cm^2

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Answer 2

Given: the sides of a triangle are 3 cm, 5 cm and 4 cm.

To find out: Area of triangle

Solution:-

The lengths of the sides are a=3 cm, b=5 cm, c=4 cm.

∴s=

2

a+b+2

=

2

3+5+4

cm=6 cm

We use the formula,

Δ=

s(s−a)(s−b)(s−c)

.

∴Δ=

6(6−3)(6−5)(6−4)

cm

2

=

6×3×1×2

sq.cm

=6 sq.cm

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