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3 years ago

An equilateral triangle has an altitude of 21 inches. What is the side length of the triangle?

Mathematics

2 answers:

kvv77 [185]3 years ago

4 0

Hey, here’s your answer :)

Lena [83]3 years ago

3 0

here it is it is not my answer but i hope it helps!

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Alex777 [14]

Answer:

Step-by-step explanation:

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3 years ago

Read 2 more answers

I will give 5 points

ikadub [295]

Use the sum of cubes factoring rule

$a^3 + b^3 = (a+b)(a^2 - ab + b^2)$

to transform the left hand side into the right hand side.

$\frac { \sin^{3} \theta + \cos^{3} \theta } { \sin \theta + \cos \theta } = 1 - \sin \theta \cdot \cos \theta\\\\\frac { (\sin \theta + \cos \theta)(\sin^2 \theta - \sin \theta \cdot \cos\theta + \cos^2 \theta) } { \sin \theta + \cos \theta } = 1 - \sin \theta \cdot \cos \theta\\\\$

$\sin^2 \theta - \sin \theta \cdot \cos\theta + \cos^2 \theta = 1 - \sin \theta \cdot \cos \theta\\\\(\sin^2 \theta + \cos^2\theta)- \sin \theta \cdot \cos\theta = 1 - \sin \theta \cdot \cos \theta\\\\1- \sin \theta \cdot \cos\theta = 1 - \sin \theta \cdot \cos \theta \ \ \checkmark\\\\$

Throughout the entire process, the right hand side stayed the same.

On the last step, I used the pythagorean identity.

8 0

2 years ago

Your suppose to look at the graph. <br> If you could help me that would be great!

kozerog [31]

Answer:

B) $3 per gallon

Step-by-step explanation:

You can see on the graph that for 1 gallon of gasoline, it is $3.

Hope this helped!

Please mark as brainliest!

4 0

3 years ago

Can someone help me with this it is confusing :(

Marina CMI [18]

What are you wanting help with

7 0

3 years ago

How can i find the area of this triangle?

Ivanshal [37]

To find the area of a triangle, multiply the base by the height, and then divide by 2. The division by 2 comes from the fact that a parallelogram can be divided into 2 triangles. For example, in the diagram to the left, the area of each triangle is equal to one-half the area of the parallelogram.

3 0

3 years ago