Question

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

The measure of ∠DAB equals 110º. The measure of ∠ACB equals 20º.

What is m∠ABC?

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Answer 1

∠ABC=90°

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