Join the IDNLearn.com community and get your questions answered by experts. Ask anything and receive prompt, well-informed answers from our community of experienced experts.

Help me please help help

Help Me Please Help Help class=

Sagot :

9514 1404 393

Answer:

  48°

Step-by-step explanation:

The acute angles in a right triangle are complementary, so angle CAD is ...

  ∠CAD = 90° -60° = 30°

When an angle is divided, the whole is the sum of the parts.

  ∠DAB +∠CAD = ∠CAB

  ∠DAB +30° = 78°

  ∠DAB = 48° . . . . . . . . . . subtract 30°

_____

Alternate solution

The sum of angles in a triangle is 180°, so ...

  60° +78° +∠B = 180°

  ∠B = 180° -138° = 42°

  ∠DAB = 90° -42° = 48° . . . . . acute angles in a right triangle

We value your participation in this forum. Keep exploring, asking questions, and sharing your insights with the community. Together, we can find the best solutions. IDNLearn.com is committed to your satisfaction. Thank you for visiting, and see you next time for more helpful answers.