1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
fomenos
3 years ago
8

Find the area of an equilateral triangle (regular 3 Gon) with the given measurement 9 in perimeter a=SQ.in

Mathematics
1 answer:
blsea [12.9K]3 years ago
4 0

Answer:

3.897 in^{2}

Step-by-step explanation:

equilateral triangles are also equiangular, meaning the have equal angles.

Triangle sum theory says that angles of a triangle add up to 180.

That means each angle is 60.

A = bh/2

You need the (h). The base of is 3.  Perimeter = 9, so each side is 3

Draw a perpendicular line for the height. The line cuts the base in half (1.5)

Using trigonometry you can find the height.

tan 60° = h/1.5

h = height, 1.5 is half of 3, 60° is the base angle.

multiply each side by 1.5

1.5(tan 60°) = h

h=2.598

then substitute h into formula

A= <u>(2.598)(3) </u>

           2

A = 3.897 rounded

You might be interested in
13) Please Help With This Question.<br> WILL MARK BRAINLIEST. + 10 POINTS!!!
jeka94
Answer should be B.
second choice
8 0
3 years ago
Read 2 more answers
enrollment in the ski/snowboard club increased by 30% this year. there are now 182 students in the club. how many students were
eduard
Enrolement increased by 30% that means last year=100%
incease of 30%=30+100=130% now

now=182

percent means parts out of 100 so
130%=130/100=13/10


182=13/10 of x (x represents the number last year)
of means multipy so
182=13/10 times x
multiply both sides by 10/13 to clear fraction
182 times 10/13=x=140



140 students last year
8 0
3 years ago
Type the correct answer in the box. Use numerals instead of words. If necessary, use / for the fraction bar. Find the remainder
victus00 [196]

Answer:

88

Step-by-step explanation:

Given:

(h⁴ + h² – 2) ÷ (h + 3).

We could obtain the remainder using the remainder theorem :

That is the remainder obtained when (h⁴ + h² – 2) is divided by (h + 3).

Using the reminder theorem,

Equate h+3 to 0 and obtain the value of h at h+3 = 0

h + 3 = 0 ; h = - 3

Substituting h = - 3 into (h⁴ + h² – 2) to obtain the remainder

h⁴ + h² – 2 = (-3)⁴ + (-3)² - 2 = 81 + 9 - 2 = 88

Hence, remainder is 88

4 0
2 years ago
Please help
Montano1993 [528]

Answer:

M = 2x² - (ax/3) + by

B = - 3x²y + (xy³/3) - cy

Step-by-step explanation:

Equation 1 is

2x² - (1/3)ax + by - M = 0

M = 2x² - (ax/3) + by

Equation 2

3x²y - (1/3)xy³ + cy + B = 0

B = - 3x²y + (xy³/3) - cy

Hope this Helps!!!

7 0
3 years ago
Simplify: (10*5+6)(13+2)+19
lianna [129]
The answer would be 859.  

<span><span><span><span><span><span>(10)</span><span>(5)</span></span>+6</span>)</span><span>(<span>13+2</span>)</span></span>+19
</span><span>=<span><span><span>(<span>50+6</span>)</span><span>(<span>13+2</span>)</span></span>+19
</span></span><span>=<span><span>56<span>(<span>13+2</span>)</span></span>+19
</span></span><span>=<span><span><span>(56)</span><span>(15)</span></span>+19
</span></span><span>=<span>840+19
</span></span><span>=<span>859

Hope this helps!!

</span></span>
7 0
3 years ago
Read 2 more answers
Other questions:
  • Which strategy would you use to find 2+8? a) doubles plus 1. b)count on. c) doubles. d) doubles minus 1
    8·1 answer
  • Jessica had 105 dollars to spend on 8
    11·1 answer
  • A jar contains 17 orange,7 pink, and 4 black marbles. A marble is drawn at random.What is the probability that the marble is pin
    13·1 answer
  • Simplify the expression.<br> -1 -5.7|<br> A. 6<br> B. -6<br> C. -5.7<br> D. 5.7
    9·1 answer
  • Erica knits 18 squares on Monday. She knits 7 more squares each day from Tuesday through Thursday. How may does Erica knit on Fr
    12·1 answer
  • Mr. canton places 24 desks in 6 equal rows. how many is in each row?? is it 24 times 6
    11·2 answers
  • There are 624 students at Lincoln Middle School. 78 of the students are left-handed. What percent of students at Lincoln Middle
    6·1 answer
  • A car travels for 4 hours at an average speed of 45mph and then 6hours at an average speed of 35mph. Work out the distance trave
    9·1 answer
  • Worth 10 points <br><br> It’s a picture so it’s clear
    7·2 answers
  • 49,52,52,52,55,55,74,67 find Q3
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!