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julsineya [31]
3 years ago
13

Find the area of an equilateral triangle that has perimeter of 24 m. ​

Mathematics
1 answer:
mafiozo [28]3 years ago
6 0

we know the perimeter is 24, and is an equilateral triangle, so it has three equal sides, so each side is 24 ÷ 3 = 8.

\bf \textit{area of an equilateral triangle}\\\\ A=\cfrac{s^2\sqrt{3}}{4}~~ \begin{cases} s=side's\\ \qquad length\\ \cline{1-1} s = 8 \end{cases}\implies A=\cfrac{8^2\sqrt{3}}{4}\\\\\\ A=16\sqrt{3}\implies A\approx 24.71

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The midpoint M of the line segment AB is (-3,7). If the coordinate of B is (5,-1), what is the coordinate of the point A?
sleet_krkn [62]

Answer:

Coordinate of Point A is (-11, 15)

Step-by-step explanation:

M -- (-3, 7)

B -- (5, -1)

Therefore, (5 + x)/2  = -3

x = -11

(-1 + y)/2 = 7

y = 15

Therefore Point A is (-11, 15)

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Answer:

14.46

Step-by-step explanation:

first hour: 35.7

2 hour: 30.34

3 hour: 25.79

4 hour: 21.93

5 hour: 18.64

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A group of 50 people has a ratio of 2:3 boys to girls. How many girls are there?
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4 0
3 years ago
10. In right triangle FGH shown below,
Vikki [24]

Applying the leg rule, and solving algebraically, the lengths are determined as:

JG = 9

HJ = 12

<h3>What is the Leg Rule?</h3>

The Leg rule states that when an altitude bisects the right angle of a right triangle and intersects the hypotenuse, then, hypotenuse/leg = leg/part.

Find length of JG using algebraic solutions and the leg rule:

Let JG = x

Hypotenuse = x + 16

Leg = 15

Part = x

Therefore:

(x + 16)/15 = 15/x (leg rule)

Cross multiply

x(x + 16) = (15)(15)

x² + 16x = 225

x² + 16x - 225 = 0

Factorize

(x + 25)(x − 9) = 0

x = -25 or x = 9

The length of JG (x) cannot be negative, therefore, the length of JG = 9.

Find length of JG using algebraic solutions:

Let HJ = y

Based on the altitude theorem, we would have:

y = √(16 × JG)

Substitute

y = √(16 × 9)

y = √(144)
y = 12

Therefore, the length of HJ is: 12.

Learn more about the leg rule on:

brainly.com/question/25016594

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