Find the area of triangle whose sides are 8cm , 11cm and 13cm. Find the area by heron's fornula
Answers
Answered by
2
Answer:
Sides = 8cm , 11 cm , 13cm
Semi Perimeter = a + b + c / 2
= 8+ 11 + 13 / 2
=32 / 2
= 16 cm
Area = √S ( s - a ) ( s - b ) ( s - c )
= √16 ( 16 - 8 ) ( 16 - 11 ) ( 16 - 13 )
= 16 ( 8) ( 5 ) ( 3 )
Factor this = 2×2×2×2×2×2×2×5×3
= 2×2×2 √2×5×3
= 8 √30cm²
Please mark me as brainliest
Answered by
0
Answer:
A = 28.98 cm
Step-by-step explanation:
a = 8cm, b = 11cm, c = 13cm
area of triangle by heron's formula =
A = √[ S × ( S - a ) × ( S - b ) × ( S - c ) ]
S = a + b + c / 2
S = 8cm + 11cm + 13cm / 2
S = 32cm / 2
S = 16cm
A = √[ S × ( S - a ) × ( S - b ) × ( S - c ) ]
A = √ 16 × ( 16 - 8 ) × ( 16 - 11 ) × ( 16 - 13 )
A = √ 16 × 8 × 5 × 3
A = √ 1920
A = 43.82 cm
Similar questions