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77julia77 [94]
3 years ago
7

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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