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worty [1.4K]
3 years ago
14

Ayo how do I find the unknown

Mathematics
2 answers:
Sergio039 [100]3 years ago
4 0

Answer:

x = 13

Step-by-step explanation:

Since AB = AC , then Δ ABC is isosceles

So the base angles are congruent , both 2x + 15

The sum of the 3 angles = 180° , then

2x + 15 + 2x + 15 + 98 = 180

4x + 128 = 180 ( subtract 128 from both sides )

4x = 52 ( divide both sides by 4 )

x = 13

 

galina1969 [7]3 years ago
3 0

<em>as,</em><em> </em><em>AC </em><em>=</em><em> </em><em>AB </em><em>so,</em><em> </em><em>angle </em><em>C </em><em>=</em><em> </em><em>angle </em><em>B </em>

<em>so,</em><em>. </em><em>value</em><em> </em><em>of </em><em>Angle </em><em>b </em><em>=</em><em> </em><em>2</em><em>x</em><em> </em><em>+</em><em> </em><em>1</em><em>5</em><em>°</em><em> </em><em>as </em><em>well,</em>

<em><u>hope </u></em><em><u>this</u></em><em><u> answer</u></em><em><u> helps</u></em><em><u> you</u></em><em><u> dear</u></em><em><u>.</u></em><em><u>.</u></em><em><u>.</u></em><em><u>and </u></em><em><u>may </u></em><em><u>u </u></em><em><u>have</u></em><em><u> a</u></em><em><u> great</u></em><em><u> day</u></em><em><u> ahead</u></em><em><u>!</u></em>

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