Find the area of an equilateral triangle of perimeter 30 cm

≈ 43.3 cm²

Step-by-step explanation:

The area (A) of an equilateral triangle is calculated as

A = (  s is the side length )

The 3 sides of an equilateral triangle are congruent, thus

s = 30 ÷ 3 = 10 cm

A = = = 25 ≈ 43.3 cm²

43.30cm²

Step-by-step explanation:

Use Herons formula

S = (a+b+c)÷2

Where a, b, c is the sides of the triangle

If perimeter is 30cm

Since it's an equilateral triangle, all sides are equal.

Then

Perimeter = 3a = 30

a = 30/3 = 10cm

b = 10cm , c = 10cm

Therefore ,s=  (10+10+10)÷2 = 30÷2 = 15cm

From Herons formula

Area = square root of s(s-a)(s-b) (s - c)

Area = sq rt 15(15 - 10)(15 - 10)(15 - 10)

Area = sq rt 15.× 5 × 5 ×5

Area = sq rt 1875

Area = 43.30cm²

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the correct answer is b) histograms can be used to exhibit the shape of distributions. this is because histograms count the frequency of each possible answer, so one is able to see which results are more common and which are less common.

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step-by-step explanation: