17-09-2021
Mathematics

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need help on this pls help

need help on this pls help class=

Respuesta :

Аноним Аноним

17-09-2021

Answer:

129 degrees

Step-by-step explanation:

The sum of all the angle of a quadrilateral is always 360 degrees, 51+90+90+129=360

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Please help me thanks. Brainliest included.