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find the value of x and the measures of the missing angles​

Find The Value Of X And The Measures Of The Missing Angles class=

Sagot :

Devishri1977idn

Answer:

Step-by-step explanation:

m∠X + m∠Y + m∠Z = 180          {angle sum  property of triangle}

3x + 5 + 40 +4x - 5 = 180

3x + 4x  + 5 + 40 -5 = 180           {Combine like terms}

                   7x + 40 = 180        { subtract 40 from both sides}

                            7x = 180 - 40

                            7x = 140

                             x = 140/7

                            x = 20

m∠X = 3x + 5

         = 3*20 + 5

         = 60 + 5

m∠X = 65

m∠Z = 4x - 5

         = 4*20 - 5

        = 80 - 5

m∠Z = 75

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