Question

Rehan student of class 9 visit the buddha park with his father. He noticed that a side wall of a buddha park, painted in black colour with a measure, to follow the traffic rules ​

Answer 1

Complete Question :- Rehan student of class 9 visit the buddha park with his father. He noticed that a side wall of a buddha park, painted in black colour with a measure, ' TO FOLLOW THE TRAFFIC RULES' . If the sifes of the wall are 5 cm, 6 cm and 7 cm respectively then find the area of the wall. ?

Solution :-

we know that, area of a ∆ with sides as a, b and c is ,

• √[s * (s - a) * (s - b) * (s - c)
• where s = (a + b + c)/2

given that,

• a = 5 cm
• b = 6 cm
• c = 7 cm

then,

• s = (a + b + c)/2
• s = (5 + 6 + 7)/2
• s = 18/2
• s = 9 cm.

therefore,

→ Area of wall = √[s * (s - a) * (s - b) * (s - c)]

→ Area of wall = √[9 * (9 - 5) * (9 - 6) * (9 - 7]

→ Area of wall = √[9 * 4 * 3 * 2]

→ Area of wall = 3 * 2 * √(3 * 2)

→ Area of wall = 6√6 cm². (Ans.)

Hence, The area of the wall will be 6√6 cm².

Learn more :-

In ABC, AD is angle bisector,

angle BAC = 111 and AB+BD=AC find the value of angle ACB=?

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