Question

The size of a rectangle are 3 cm 5 cm and 6 cm. What is its area.​

Answer 1

Step-by-step explanation:

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=2a+b+2=23+5+4cm=6 cm

We use the formula,

Δ=s(s−a)(s−b)(s−c).

∴Δ=6(6−3)(6−5)(6−4)cm2=6×3×1×2 sq.cm

=6 sq.cm

Answer 2

Answer:

$area \: of \: rectangle = l \times b \\ \: \: \: \: \: \: \: = 3 \times 5 \times 6 \\ \: \: \: \: = 15 \times 6 \\ = 90$

area of rectangle is 90 cm