shambrain shambrain

04-05-2021
Mathematics

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Dose someone know please

Dose someone know please class=

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DontEatBats DontEatBats

04-05-2021

The sum of all the angles in this line equals 180
a+90+21=180
a+111=180
a=69

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KIBUTSUJI KIBUTSUJI

04-05-2021

Answer:

i think its like:

see that middle angle there, thats a 90° angle and straight linea measure 180°. so add 90 + 21 and subtract from 180

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