What is the area of a triangle whose three sides are a -3 cm - b -4 cm - c -5 cmA- 12 sq-unitB- 6 sq-unitC- 12 sq-unitD- 18 sq-unit

The correct option is B 6 sq.unit Area of triangle having sided a, b, and c is √(s(s a)(s b)(s c)), here s = a+b+c/2 Substituting the value of s = 3+4+5/2 = 6 ...

You visited us 1 times! Enjoying our articles? Unlock Full Access!

Byju's Answer

Standard IX

Mathematics

Area of Triangle of an Isosceles Triangle

What is the a...

Question

What is the area of a triangle whose three sides are a = 3 cm, b = 4 cm, c = 5 cm

12 sq.unit

No worries! We‘ve got your back. Try BYJU‘S free classes today!

6 sq.unit

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

12 sq.unit

No worries! We‘ve got your back. Try BYJU‘S free classes today!

18 sq.unit

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is B
6 sq.unit

Area of triangle having sided a, b, and c is $\sqrt[2]{s (s - a) (s - b) (s - c)}$ , here s = $\frac{a + b + c}{2}$

Substituting the value of s = $\frac{3 + 4 + 5}{2}$ = 6, we get

Area = $\sqrt[2]{6 (6 - 3) (6 - 4) (6 - 5)}$ = $\sqrt[2]{6 (3) (2) (1)}$ = 6 sq.unit

Suggest Corrections

Similar questions

Area bounded by the curve $y = x e^{x^{2}}$ x - axis and the ordinates x = 0, x = a

Q. What is the area of a triangle whose sides are

3 c m

5 c m

and

4 c m

Q. The area of the region included between the parabola

y = \frac{3 x^{2}}{4}

and the line 3x – 2y + 12 = 0 is

The three sides of a triangle are 3 cm, 4 cm and 5 cm. What type of triangle is this?

Q. What is the value of the hypotenuse of a right triangle whose sides are

12

and

18

Join BYJU'S Learning Program

What is the area of a triangle whose three sides are a = 3 cm, b = 4 cm, c = 5 cm

The correct option is B 6 sq.unit Area of triangle having sided a, b, and c is 2√s(s−a)(s−b)(s−c), here s = a+b+c2 Substituting the value of s = 3+4+52 = 6, we get Area = 2√6(6−3)(6−4)(6−5) = 2√6(3)(2)(1) = 6 sq.unit