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pychu [463]
3 years ago
9

Help me pleaseee!!!!

Mathematics
1 answer:
Pani-rosa [81]3 years ago
7 0

Answer: B

The diameter is 3, so you have to divide by 2 to get the raduis. After that just plug in the height and radius and that's your answer!

Hope this helped you!

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The altitude of an equilateral triangle is 9 inches. Find the perimeter of the triangle in inches.
Fiesta28 [93]
If we  draw a perpendicular line from one of the vertices of the triangle we get  2 right angled triangles  each with  altitude 9 ins  and vertex angle = 30 degrees.   So:-

cos 30 = 9 /h     where h = one of the sides of the equilateral triangle

h =  9 / cos 30  =  10.392 inches

Therefore the perimeter of the triangle = 3 * 10.392 =  31.1769 ins

Answer is 31.18 inches to the nearest hundredth.
5 0
3 years ago
Use a net to find the surface area of the right triangular prism shown:
vazorg [7]

The surface area of the right triangular prism is 270 sq ft

<h3>Total surface ara of the prism</h3>

The total surface area of the prism is the  sum of all the area of its faces

For the two triangles

A = 2(0.5bh)

A = bh

A = 7 * 12 = 84 sq.ft

For the two rectangles

A = 2lw

A = 2(6*12)

A = 2 * 72 = 144 sq.ft

For the third triangle;
Area  6ft * 7ft

Area = 42 sq.feet

Taking the sum of the areas

TSA = 84 + 144 + 42

TSA  = 270 sq ft

Hence the surface area of the right triangular prism is 270 sq ft

Learn more on surface area of prism here; brainly.com/question/1297098

3 0
2 years ago
What is 225 square feet of 450
erik [133]
I assume you mean what percentage it is? if so:

225/450 = 50%
6 0
3 years ago
Factor the expression 26x + 13
bogdanovich [222]
Answer
Factor 13 out of 26x+13
= 13( 2x+1)
6 0
3 years ago
Please help me on this
Eddi Din [679]

Answer:

The correct answer is True.

Step-by-step explanation:

Altitude: vertical distance either between the top and bottom of something or between a base and something above it.

6 0
3 years ago
Read 2 more answers
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