MATHEMATICS MIDDLE SCHOOL

2.(3 pt) What is the perimeter of the figure?



A.
92 inches

B.
80 inches

C.
73 inches

D.
85 inches

13 14 20 12 7 26 are the #'s

Answers

Answer 1
Answer: Hello,

this hexagon has a perimeter of 13+14+20+12+7+26=92 (inches)

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In △ABC, m∠A=72°, c=61, and m∠B=16°. Find the perimeter of the triangle.

Answers

The perimeter of the triangle is about 136

Further explanation

Firstly , let us learn about trigonometry in mathematics.

Suppose the ΔABC is a right triangle and ∠A is 90°.

sin ∠A = opposite / hypotenuse

cos ∠A = adjacent / hypotenuse

tan ∠A = opposite / adjacent

There are several trigonometric identities that need to be recalled, i.e.

cosec ~ A = (1)/(sin ~ A)

sec ~ A = (1)/(cos ~ A)

cot ~ A = (1)/(tan ~ A)

tan ~ A = (sin ~ A)/(cos ~ A)

Let us now tackle the problem!

This problem is about Sine Rule.

First of all, we will calculate the ∠C :

∠A + ∠B + ∠C = 180°

72° + 16° + ∠C = 180°

∠C = 180° - 72° - 16°

∠C = 92°

Next, we will use the Sine Rule to find the length of the other side of the triangle.

(c)/(\sin \angle C) = (b)/(\sin \angle B)

(61)/(\sin 92^o) = (b)/(\sin 16^o)

b \approx \boxed {16.82}

(c)/(\sin \angle C) = (a)/(\sin \angle A)

(61)/(\sin 92^o) = (a)/(\sin 72^o)

a \approx \boxed {58.05}

Finally, we can find the perimeter of a triangle with the following formula

\text{Perimeter of the triangle} = a + b + c

\text{Perimeter of the triangle} = 58.05 + 16.82 + 61

\text{Perimeter of the triangle} \approx \boxed {136}

Learn more

Answer details

Grade: College

Subject: Mathematics

Chapter: Trigonometry

Keywords: Sine , Cosine , Tangent , Opposite , Adjacent , Hypotenuse  

Answer:

136

Step-by-step explanation:

Lyle can paint a room in 3 hours. Selena can paint a room with the same dimensions in 2 hours. If they work together, how many hours does it take them to paint the room? Round your answer to the nearest tenth?

Answers

The rate at which they paint together is 1 room per two hours plus one room per three hours. (1/2)+(1/3) = (3/6)+(2/6) = (5/6) hours, or 50 minutes.

What percent of 145 is 29

Answers

(x)/(100)* 145 = 29\n\nx = 29* (100)/(145)\n\n\boxed{x = 20}

The percentage value of 29 from 145 is 20%

Given the parameters which could be used in our calculation:

  • Numerator = 29
  • Denominator= 145

Write the expression thus :

(29/145) * 100%

0.2 * 100%

= 20%

Hence, the percentage Value of 29 from 145 is 20%

Learn more on percentages: brainly.com/question/24304697

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PLEASE HELP ASAPIs the set of multiples of 4 closed under addition? Explain why or provide a counterexample if not. A. Yes, because the sum of any two multiples of 4 is also a multiple of 4. B. Yes, because the sum of any two multiples of 4 is also a multiple of 8. C. No, and a counterexample is –4 + (–8) = –12. D. No, and a counterexample is 26 + 16 = 42.

Answers

The answer is a. I hope that helped
this is kind of hard but the answer is its a because 4 is a multiple of 4  

Can some one help me plzz

Answers


Let me try . . .

When two lines intersect, they form four (4) angles, all at the same point.
There are two pairs of angles that DON't share a side, and a bunch of other
ones that do share sides. A pair of angles that DON't share a side are called
a pair of "vertical angles".

A pair of vertical angles are equal, but this problem isn't even asking you about
that; it's just asking you to find a pair of vertical angles.

Since you and I are not sitting together at the same table, I can't point to
the drawing and point out different angles to you.  You just have to go
through the choices, and find a choice where both angles are formed from
the same two lines.

The first choice (KRE and ERT) is no good, because KR,  RE,  and  RT
are parts of three different lines.

Check out the other 3 choices, and you're sure to find the only one where
both angles are formed by the same two lines.
this would be C because the liners are not intersecting 

Describe the number 43 in two ways

Answers

forty-two and 42. word form and standard form.


43 is an odd number

43 is a real number
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