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dusya [7]
3 years ago
8

Can somebody help solve it?

Mathematics
1 answer:
Oksanka [162]3 years ago
4 0

Answer:

Step-by-step explanation:

It's an isosceles triangle so it means two sides are equal or better term congruent .

So PR is equal to PQ

You can write

X+1=2x+1

Solve the equation

2x+1-x-1=0

X=0

In order to find PQ plug X in place of 2x+1

To find

QR do the same for its expression .

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May someone solve and give explanation
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Answer:

θ = 49.4584°

General Formulas and Concepts:

<u>Pre-Algebra</u>

Order of Operations: BPEMDAS

  1. Brackets
  2. Parenthesis
  3. Exponents
  4. Multiplication
  5. Division
  6. Addition
  7. Subtraction
  • Left to Right

<u>Trigonometry</u>

  • [Right Triangles Only] SOHCAHTOA
  • [Right Triangles Only] cosθ = adjacent over hypotenuse
  • Inverse Trig

Step-by-step explanation:

<u>Step 1: Define</u>

<em>Identify variables</em>

Angle θ = ?

Adjacent Leg = 13

Hypotenuse = 20

<u>Step 2: Find Angle</u>

  1. Substitute in variables [cosine]:                                                                   cosθ = 13/20
  2. Inverse Trig:                                                                                                    θ = cos⁻¹(13/20)
  3. Evaluate:                                                                                                         θ = 49.4584°
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