Question

find the area and height of an equilateral triangle whose side is 20cm.​

Answer 1

Answer:

20x3= 60cm

60 cm is the area and

idk... what is it's hight

Answer 2

Given:-

• Side of an equilateral triangle is 20 cm.

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To find:-

• Area of the equilateral triangle.
• Height of the equilateral triangle.

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Solution:-

☆Area of Equilateral triangle = (√3/4)a²

→ Area = [(√3/4) × 20 × 20]

→ Area = [√3 × 5 × 20]

→ Area = 100√3 cm²

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☆Height of Equilateral triangle = [a√3/2]

→ Height = [100√3 × √3/2]

→ Height = [50 × √3 × √3]

→ Height = [50 × 3]

→ Height = 150 cm

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Hence,

• Area = 100√3 cm²
• Height = 150 cm

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⠀⠀⠀⠀⠀⠀Some Formulae

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→ Area of square = (side)²

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→ Area of rectangle = length × breadth

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→ Area of triangle = ½ × base × height

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→ Area of parallelogram = base × height

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→ Area of Circle = πr²