Triangle A B C is shown. Angle A C B is a right angle. The length of the hypotenuse is 20.
What additional information would be necessary to determine sin(A) without using the Pythagorean theorem? Explain.

The length of AC is needed because it is the side adjacent to ∠A.
The length of AC is needed because it is the side opposite ∠A.
The length of BC is needed because it is the side opposite ∠A.
The length of BC is needed because it is the side adjacent to ∠A.

answer: kljdcdhjbdlchjad oac apoich a

step-by-step explanation:

1. d.90

2. e. none of these (80)

3. a. 0

4. b. 6

5. e. none of these (10)

6. a. 5

hey seth! : )

i’m not 100% sure, but i think it’s b

hope this ya : p

miss u!

- nicole

second option

step-by-step explanation:

the measures of a triangle equal 180. use that to find x.

2x+3x+4x=180

9x=180

9x/9=180/9

x=20

now you know x, you know angle a is 40°, angle b is 60°, angle c is 80°.

because angle a is 40°, the first option doesn't work.

because angle b is 60°, the second option does work.

when you add angle a and b, you get 100°. complementary means it equals 90°, so the third option doesn't work.

when you add angle a and c, you get 120°, which is not 100.