2 years ago

In what situations (if any) is Heron’s formula useful for finding the area of a triangle.

Mathematics

1 answer:

Inga [223]2 years ago

5 0

Heron’s formula is useful when we know all three sides of triangle

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A paved walkway around a garden has an outer diameter of 80 ft and an inner diameter of 40 ft. A diagram is shown below.

k0ka [10]

Given:

Outer diameter = D = 80 ft
Inner diameter = d = 40 ft

So,

Outer radius = R = D/2

=> R = (80 ft)/2

=> R = 40 ft

Inner radius = r = d/2

=> r = (40 ft)/2

=> r = 20 ft

Area of paved pathway = πR² - πr²

= π(R² - r²)

= π(R + r)(R - r)

= π(40 + 20)(40 - 20) ft²

= π(60)(20) ft²

= 3.14 * 1200 ft²

= 3768 ft²

6 0

2 years ago

Find an equivalent ratio in simplest terms:<br> 30 : 66<br> Someone please help

Keith_Richards [23]

15:33 10:22 60:132 are some

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2 years ago

At Pizza Pi, 100% of the pizzas made last week had extra cheese. If 20 pizzas had extra cheese, how many

DiKsa [7]

Answer:

20 pizzas

Step-by-step explanation:

100% of the pizzas were made with extra cheese.

20 pizzas had extra cheese

100% of 20 = 20

So... 20 pizzas

3 0

3 years ago

Which of the following statements is true about the three quadrilaterals?

I am Lyosha [343]

A and C should be the answer, hope this helps

3 0

2 years ago

Help me as soo as possible please, the M in Mbc stands for “angle”

JulijaS [17]

Answer:

Step-by-step explanation:

Given is a picture of circle with angle

BOC =7x-11

Also angle of arc BC = angle BOC = 3x+53

Since both are the same equate the two

$7x-11=3x+534x=64x=16$

Now substitute this x value in any one of 3x+53 or 7x-11

Angle COB = angle BOC = 3x+53

= 48+53 = 101 degrees

-------------------------

To find length of arc

Central angle = 101

Hence arc lengh = $\frac{101}{360} 2(\pi r)\\=2\frac{101}{360}(3.14)(5)\\=8.81$

8 0

3 years ago