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andreev551 [17]
3 years ago
14

Find the measure of angle y

Mathematics
1 answer:
chubhunter [2.5K]3 years ago
5 0
<h2><u>ISOSCELES TRIANGLE</u></h2>

An isosceles triangle is a triangle that has two sides of equal length. In this exercise, we see small lines on two of the sides. This means that those sides are equal.

‎      ‏‏‎

Equalize the expressions:

<h3>6x - 23 = 4x + 9</h3>

Add 23 to both sides of the equation:

6x - 23 + 23 = 4x + 9 + 23

‎      ‏‏‎‎      ‏‏‎‎    6x = 4x + 32

Substract 4x from both sides:

6x - 4x = 4x - 4x + 32

    ‏‏‎‎  2x = 32

Finally, divide both sides by 2:

\mathsf{\dfrac{2x}{2} = \dfrac{32}{2}}

\large{\boxed{\mathsf{x = 16}}}

‎      ‏‏‎

Now, let's find the measures of the angles:

  • (6x - 23)° = 6(16) - 23 = 96 - 23 = 73°
  • (4x + 9)° = 4(16) + 9 = 64 + 9 = 73°

‎      ‏‏‎

Remember: The sum of the three angles of any triangle is equal to 180 degrees. Let's find the measure of the angle Y:

73° + 73° + Y = 180°

146° + Y = 180°

Y = 180° - 146°

Y = 34°

‎      <u>‏‏‎</u>

<h3><u>Answer</u>. m∠Y = 34°</h3>

‎      

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