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Kisachek [45]
3 years ago
8

HELP ME PLEASEE ASAP!!!! PLEASEE

Mathematics
1 answer:
11111nata11111 [884]3 years ago
6 0

Answer:

<h2>25</h2>

Step-by-step explanation:

So there is this property,

Sum of two angle of triangle = exterior angle

So based on this we can form an algebraic equation (NOTE: this is an equilateral triangle so all the sides are 60°)

4x + 20 = 60 + 60 \\ 4x = 120 - 20 \\ 4x = 100 \\ x =  \frac{100}{4}  \\ x = 25

So it's option B.

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