Question

the sides of the triangle being 9 cm, 28 cm and 35 cm find the area

Answer 1

Answer:

semiperimeter = sum of all sides /2

s = a + b + c /2

s = 9+28+35 /2 = 72/2 = 36

area = √ s ( s- a ) ( s - b ) ( s-c)

= √ 36 ( 36-9 ) ( 36 - 28 ) ( 36 - 35 )

= √ 36 × 27 × 8 × 1

= √ 3×2 × 3 × 2 × 3×3×3×2×2×2

= 3×2×3×2 √ 3×2

= 36 √ 6 cm ^2

please mark as brainliest answer and follow me

Answer 2

Step-by-step explanation:

area area of triangle by heron's formula

9 + 28 + 35 / 2 will be equal to semi perimeter

hope it helps you