Question

(b) The sides of a triangle are 29 cm, 20 cm and 21 cm. Find the area of the triangle.

Answer 1

Answer:

Area of the Triangle = 210cm²

Step-by-step explanation:

Given :

Sides of a Triangle = 29cm [ a ], 20 cm [ b ] and 21 cm [ c ]

To find out :

Area of the Triangle = ?

Area of a Triangle formula is :

Square root of s ( s - a )( s - b )( s - c )

's' over here, is nothing but :

s = ( a + b + c )/2

So, s = (29 + 20 + 21)/2

s = 70/2

s = 35

So, when we apply the formula :

= Square root of s ( s - a )( s - b )( s - c )

= Square root of 35 ( 35 - 29 )( 35 - 20 )( 35 - 21 )

= Square root of 35 × 6 × 15 × 14

= Square root of 44100

= 7 × 5 × 3 × 2

= 210 cm²

Therefore, Area of the Triangle = 210 cm²

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Answer 2

Answer:

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