Question

In ∆ABC, m∠ACB = 90°, m∠A = 40°,

Answer 1

Step-by-step explanation:

u get this diagram^

to find DBC

B+40+90=180

B=50°

to find BCD

CDB is 90° ( since perpendicular to AB)

so taking triangle BCD

90+50+c=180

c=40°

Answer 2

Answer:

45°

Step-by-step explanation:

using the diagram above

<A=40 <C=90 since the interior angle of triangle is 180° <B =50

again /CD/ is perpendicular to /AB/ this means that<BCD =45°