lexie41
lexie41
27-04-2017
Mathematics
contestada
how can I solve this?
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yguo0818
yguo0818
27-04-2017
∠a+108°=180°
so∠a=72°
and ∠b+∠a=90°
so ∠b= 18°
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qwertyuiop98
qwertyuiop98
27-04-2017
a straight line is measured to be 180 degrees so, 180-108 = 72 degrees for a. then a+b = 90 degrees. b=90-72=18 degrees. :)
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