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dedylja [7]
3 years ago
14

What is the area of a triangle length 2.5 height 8.75

Mathematics
2 answers:
gregori [183]3 years ago
3 0
Area of a triangle = 0.5 x base x height
                            = 0.5 x 2.5 x 8.75
                            = 10.94 (units squared) 
bekas [8.4K]3 years ago
3 0
My Geometry teacher used to say, 

"My students, ahh. Textbooks. They say, 'My pretty little students, here's a formula! I will give you numbers and you plug it in.' Then he would say, 'I don't like textbooks. I'm a rebel! So, I derive the formula.'" 

He made us derive it. But the formula is this: 1/2 x b x h. Why? The real formula is because two equal triangles are both HALF of a PARALLELOGRAM. 

Parallelogram area formula is b x h, or base x height. So half of that? 
(b x h) / 2, or 1/2 x b x h.

Plug this in. 

Assuming your triangle is equilateral, I plug in 2.5 for the base and 8.75 for the height. 

So, what's 1/2 x 2.5 x 8.75?

It's 10.9375.

Rounded, it's 10.94.

You have it.

Just remember, it's about WHY this formula works.
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3 years ago
Find 4 geometric means between -5 and -125.
balandron [24]

The geometric means between -5 and -125 is; 25

<h3>How to find the geometric mean?</h3>

To find the geometric mean between two numbers, we simply find the square root of the product of the two numbers.

For example, geometric mean between A and B is;

G.M = √(A * B)

Thus, geometric mean between -5 and -125 is;

G.M = √(-5 * -125)

G.M = √625

G.M = 25

There could be other geometric means between this like;

G.M = √(-5 * -45) = 15

Or GM = √(-10 * -40) = 20

Read more about geometric mean at; brainly.com/question/17266157

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PLEASE HELP ASAP!!!!!!!!!! EASY MATH 25 PTS
Harman [31]

its not worth 25 points but ok here u go let's solve your equation step-by-step.

3y−1=13−4y

Step 1: Simplify both sides of the equation.

3y−1=13−4y

3y+−1=13+−4y

3y−1=−4y+13

Step 2: Add 4y to both sides.

3y−1+4y=−4y+13+4y

7y−1=13

Step 3: Add 1 to both sides.

7y−1+1=13+1

7y=14

Step 4: Divide both sides by 7.

7y

7

=

14

7

y=2

Answer:

y=2 so there your answer is this equation has one solution  your welcome

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Find the area<br>of the triangle whose box is 45cm<br>and height is 12cm​
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60 cm is the answer

Step-by-step explanation:

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