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lutik1710 [3]
3 years ago
5

What is the surface area of the cone?

Mathematics
1 answer:
quester [9]3 years ago
4 0
Using the formulas
A = pi r l + pi r^2
l = squared r^2 + h^2

A = 130.72951
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Triangle KML and triangle PRQ are shown in the figure belowK404008 cms4 cms10 cmsOL3 cms6 cmsRM17) Are these triangles similar?1
s2008m [1.1K]

Two triangles are similar if the only difference between them is the size, this means that their internal angles must be the same. If we look at the picture the first triangle has one angle equal to 40 degrees, one equal to 80 degrees and the third one is unkown (x). The second triangle has one angle equal to 40 degrees, one equal to 60 degrees and the third one is unkown (y). The sum of the internal angles of a triangle must be equal to 180 degrees, with this information we can find the values of the missing angles. We have:

\begin{gathered} 40+80+x=180 \\ 120+x\text{ = 180} \\ x\text{ = 180-120=60} \end{gathered}\begin{gathered} 40+60+y=180 \\ 100+y=180 \\ y=180-100=80 \end{gathered}

Therefore the internal angles of the first triangle are (40,80,60) and the angles of the second triangle are (40,80,60) as well, therefore they are similar.

Two triangles are congruent if they have sides with the same length. Which is not the case, because the sides of one triangle is (8, 10, 6) while the other is (4,3 and unkown). Therefore they are not congruent.

8 0
1 year ago
C/ 8= 9. What does c equal
Norma-Jean [14]

Answer: 72

72/8 will get you 9. To see if the answer is correct Multiply 9*8.

7 0
2 years ago
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Virginia is 7-years old. georgia is 14 years old. both girls like to write short stories
makkiz [27]
She can become an excellent writer if she continues to work at it. 
5 0
3 years ago
BRAINLIEST WILL BE GIVEN TO 1ST ANSWER THAT IS RIGHT
Anna [14]

The given info is sufficient to warrant the conclusion that both triangles are 45-45-90 triangles.

The measure of angle B is 45 degrees, or pi/4 radians.

The cosine of this angle B is 1/√2, or √(2)/2. This is approx. 0.707.

3 0
3 years ago
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V = u + at<br><br> u = 2 a = -5 t = 1/2
denpristay [2]

Answer:

v = -0.5

Step-by-step explanation:

v = 2 + (-5 * 1/2)

v = 2 + (-2.5)

v = -0.5

6 0
3 years ago
Read 2 more answers
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