Question

find the area of a triangle whose sides is 40cm, 40cm, 40cm​

Answer 1

Step-by-step explanation:

There, the all sides are equal .

So , it's a equilateral triangle .

Area of equilateral triangle

= √3/4 *a²

= √3a² / 4

= √3(40)²/4

= 1600√3 / 4

= 400√3 cm²

Answer 2

Answer:

692.8 sq. cm

Step-by-step explanation:

Given a triangle

Length of sides are

• 40 cm
• 40 cm
• 40 cm

Clearly, all the sides arw equal in Length.

Therefore, it's an equilateral triangle.

Now, to find the area.

We know that,

Area of equilateral triangle having side length a, is given by, $\bold{\dfrac{\sqrt{3}}{4}{a}^{2}}$

Here, we have,

• a = 40 cm

Substituting the values, we get,

=> Area = √3/4 × (40 × 40)

=> Area = (√3 × 40 × 10) sq. cm

=> Area = 400√3 sq. cm

=> Area = 400 × 1.732 sq. cm

=> Area = 692.8 sq. cm

Hence, required area = 692.8 sq. cm