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Alenkinab [10]
2 years ago
14

Can anyone help me pls?

Mathematics
2 answers:
amm18122 years ago
8 0

Basic fact:

<em>angles on a straight line always add up to </em><em>180</em><em> degrees</em>

Step-by-step explanation:

  1. 39+a=180       a=141
  2. 157+a=180      a=23
  3. 92+a=180       a=88
  4. 60+a=180       a=120
  5. 61+a=180        a=119
  6. 28+a=180       a=152
  7. 52+a=180       a=128
  8. 121+a=180       a=59
  9. 151+a=180       a=29
  10. 128+a=180      a=52
Kryger [21]2 years ago
7 0

Answer:

in every question you should subtract the given value by 180

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Exact form: 13/12

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22. Find the perimeter and area.
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Answer:

Part 22) The area is A=15a^3b^6\ units^2( and the perimeter is P=10a^2b^4+6ab^2\ unit

Part 24) The area is A=16m^3n\ units^2 and the perimeter is P=24mn\ units    

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Step-by-step explanation:

Part 22) Find the perimeter and area

step 1

The area of a rectangle is equal to

A=LW

we have

L=5(a^2)(b^4)\ units

W=3(a)(b^2)\ units

Remember that

When multiply exponents with the same base, adds the exponents and maintain the base

substitute in the formula

A=(5(a^2)(b^4))(3(a)(b^2))

A=15a^3b^6\ units^2

step 2

The perimeter of a rectangle is equal to

P=2(L+W)

we have

L=5(a^2)(b^4)\ units

W=3(a)(b^2)\ units  

substitute in the formula

P=2(5(a^2)(b^4)+3(a)(b^2))

P=10a^2b^4+6ab^2\ unit

Part 24) Find the perimeter and area

step 1

The area of triangle is equal to

A=\frac{1}{2}bh

where

b=8mn\ units

h=4m^2\ units

Remember that

When multiply exponents with the same base, adds the exponents and maintain the base

substitute the given values

A=\frac{1}{2}(8mn)(4m^2)

A=16m^3n\ units^2

step 2

Find the perimeter

I will assume that is an equilateral triangle (has three equal length sides)

The perimeter of an equilateral triangle is

P=3b

where

b=8mn\ units

substitute

P=3(8mn)

P=24mn\ units

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The area of a circle is equal to

A=\pi r^{2}

where

r=3x^3y\ units

Remember the property

(a^{m})^{n}=a^{m*n}

substitute in the formula the given value

A=\pi (3x^3y)^{2}

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