Question

Let A = 40. If B is complement of A, and C is a supplmenet of B, what is B+C?


A. 60
B. 150
C. 180
D. 210

Answer 1

Do you know what complementary and supplementary angles are?

Answer 2

Oh wait.. Complementary angles are angles that add up to 90 degrees.
Supplementary angles are angles that add up to 180 degrees.

Answer 3

Exactly.

Answer 4

So, let's do the first part. It says B is a complement of A. Can you find B?

Answer 5

A is 40, so B is = 40?

Answer 6

or 50?

Answer 7

They add to 90

Answer 8

No, since A and B are complements, remember, they have to add up to 90 degrees.
A + B = 90
40 + B = 90
So, yes, B has to be 50 degrees.

Answer 9

So, now how do we find C?

Answer 10

It says C is the supplement of B. So, B + C = 180 degrees

Answer 11

C = 150

Answer 12

Err, not quite. Check out math again. o-o
We found B to be 50 degrees

Answer 13

130

Answer 14

Oh, I'm slow. I already solved the question. It asked what they were equal to which is 180.. LOL

Answer 15

Mhm. c:
Ohno, I just realized the end of this question. xD
But it's practice.
It just ask for B+C, but we could've known it was 180 from the start.

Answer 16

I KNOW RIGHT LOLOLOL

Answer 17

Thanks man