Question

find the area of the triangle 6.9m 5.5m 4.2m

A.16.5m^2
B.11.55m^2
C.23.1m^2
D.4.85m^2

Answer 1

use this formula 1/2× base ×height

Answer 2

The area of triangle is 11.55 sq.m.

Step-by-step explanation:

Sides of triangle :

a = 6.9 m

b = 5.5 m

c = 4.2 m

Area of triangle =$\sqrt{s(s-a)(s-b)(s-c)}$

Where $s= \frac{a+b+c}{2}$

Substitute the values :

$s=\frac{6.9+5.5+4.2}{2}$

$s=8.3$

Area of triangle =$\sqrt{8.3(8.3-6.9)(8.3-5.5)(8.3-4.2)}$

Area of triangle =$11.55 m^2$

Hence The area of triangle is 11.55 sq.m.

#Learn more:

The sides of a triangle are 56,60,52cm long. Find the area of the triangle

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