Question

the lengths of sidesof at triangle are 5 m 1.2 decameter & 130 decimeter​

Answer 1

Answer:

Let BC=1.2 decameter =12 m

AC=130 dm=

10

130

m=13 m

and AB=5 m

Now, it is clear that,

AB

2

+BC

2

=AC

2

So, it is a right angled triangle.

∴Area=

2

1

×BC×AB=

2

1

×12×5=30 m

2

.