Question

If Ð1 and Ð2 are complementary angles, and mÐ1 = 74!; "nd mÐ2.

Answer 1

∠ D2 = 16°

Explanation:

complementary angles sum to 90° , then

∠ D1 + ∠ D2 = 90°

74° + ∠ D2 = 90° ( subtract 74° from both sides )

∠ D2 = 16°

Answer 2

If two angles are complementary they add up to a total of 90 degrees.

So we know that

D1+D2=90, because the problem tells us they're complementary

Now, we know as well that D1 = 74, so we can plug it into the little equation and solve in terms of D2.

`D1+D2=90`

`74+D2=90`

`D2=90-74`

`D2=16`

hope it helps have a great time learning!