Question

find the area of isosceles triangle whose equal side are 6cm,6cm,and 8 cm
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Answer 1

Answer:

just sum the number 6+6+8 = 20

answer 20

Step-by-step explanation:

I hope it helps you

Answer 2

Given :

Isosceles triangle whose equal side are 6cm,6cm,and 8 cm.

To Find :

The area.

Solution :

Analysis :

First we have to find the perimeter and then the semiperimeter. After that using Heron's Formula, we can get the area.

Required Formula :

• Heron's Formula = √[s(s - a)(s - b)(s - c)]

where,

• s = Semiperimeter
• a = First Side
• b = Second Side
• c = Third Side

Explanation :

We are given all the three sides of a triangle. So,

Perimeter = Sum of all three sides

⇒ Perimeter = 6 + 6 + 8

⇒ Perimeter = 20

∴ Perimeter = 20 cm.

Semiperimeter :

Semiperimeter = Perimeter/2

⇒ Semiperimeter = 20/2

⇒ Semiperimeter = 10

∴ Semiperimeter = 10 cm.

Area :

Using Heron's Formula,

Heron's Formula = √[s(s - a)(s - b)(s - c)]

where,

• s = 10 cm
• a = 6 cm
• b = 6 cm
• c = 8 cm

Substituting the values,

⇒ Area = √[s(s - a)(s - b)(s - c)]

⇒ Area = √[10(10 - 6)(10 - 6)(10 - 8)]

⇒ Area = √[10(4)(4)(2)]

⇒ Area = √[10 × 4 × 4 × 2]

⇒ Area = √[10 × 4 × 4 × 2]

⇒ Area = √[5 × 2 × 2 × 2 × 2 × 2 × 2]

⇒ Area = 8√5

∴ Area = 8√5 cm².

Area of the triangle is 8√5 cm².