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zhannawk [14.2K]
3 years ago
7

What is m∠DEF?

Mathematics
1 answer:
Doss [256]3 years ago
8 0

Answer:

m<DEF = 8y - 6

Step-by-step explanation:

Given that: DEG = (3y +4)^{o}, and FEG = (5y-10)^{o}.

The given triangle is an isosceles triangle with sides DE ≅ DF.

But,

m<DEF = DEG + FEG

            =  (3y +4)^{o} + (5y-10)^{o}

            = 3y + 4 + 5y - 10

            = 8y - 6

m<DEF = 8y - 6

Therefore, the measure of < DEF is 8y - 6.

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