Question

Find the area of the following triangle whose sides are 5m,7m and 8m​

Answer 1

Step-by-step explanation:

let ..

a=5m ; b=7cm; c=8m

we have

2s =a+b+c

since s= semiperimeter

so. .s= (5+7+8)/2

.......20/2= 10

area of tri.=

$\sqrt{s (s - a)(s - b)(s - c)}$

$\sqrt{10(10 - 5)(10 - 7)(10 - 8)}$

$\sqrt{10 \times 5 \times 3 \times 2}$

$\sqrt{5 \times 2 \times 5 \times 3 \times 2}$

by making square...

we get. 5×2×√3

....10×√3. = 10×1.71

... 17.1. ans....

by Herons formula..

Answer 2

Step-by-step explanation:

The sides are 5m,7m and 8m

s = 5+7+8/2= 20/2

The area is given as √S(S-a) (S-b) (S-c)

√10 (10-5) (10-2) (10-8)

√10 (5) (3) (2)

√300

10√3