Question

The area of ∆ ABC, if perimeter of the triangle is 42m.and two sides of the ∆ are equal and the unequal side is 12 m. , is

Answer 1

=71.28sq units

hope it helps you best of luck

Answer 2

Answer:

Area of the ∆ is 18√21 m²

Step-by-step explanation:

Perimeter = 42m

Opposite sides are equal,

Third side is 12m

So, 2x+12=42 [let equal sides be x]

or, 2x=42-12

or, x=30/2

or, x=15

Semiperimeter = 42/2m =21m

Using Herons Formula,

Area of the ∆,

=√(21(21-15)(21-15)(21-12))

=√(21×6×6×9)

=√(7×3×3×2×3×2×3×3)

=3×3×2√(7×3)

=18√21 m²

Therefore area of the ∆ is 18√21m².

Hope it helps you...

Pls mrk me brainliest...