Will deem you brainliest, plz answer super fast

in ∆abc, m∠acb = 90°, m∠a = 40°,

cd

(d ∈

ab

) is a segment perpendicular to side

ab

. find m∠dbc and m∠bcd.

You find a mysterious, dull substance on the ground and pick it up for a closer look. it is powdery, very light, and soft to the touch. the substance is most likely i. an organic mineral ii. a metallic mineral iii. a nonmetallic mineral i only ii only iii only i and ii i and iii