3 years ago

HELP ASAP!!!!!!!!!!!!!

Mathematics

1 answer:

OLEGan [10]3 years ago

7 0

Answer:

∠ABC=90°

Step-by-step explanation:

if ∠DAB =110 then ∠BAC =180-110 =70° because straighht lines make 180°∠s

use the fact that the sum of angles in a Δ is 180°

∠ABC= 180-20-70= 90

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