Question

Look at the figure below.



Which conclusion is most likely correct about the figure?

The length of side AC is equal to 10 cm.

The length of side AC is equal to 15 cm.

The length of side AC is equal to 35 cm.

The length of side AC is equal to 20 cm.

Answer 1

try cosine law or sine law?

Answer 2

No, don't do any trigonometry. Just eyeball it. Should it be longer or shorter than CD?

Answer 3

@Valpey i dont know lol

Answer 4

Look at AC as compared to CD. The only difference between the triangle on top and the triangle on bottom is the angle on the left. Which is bigger, 47 degrees or 40 degrees?

Answer 5

The length of side AC is equal to 10 cm. maybe ?

Answer 6

they look the same to me lol

Answer 7

so would it be 10 cm?

Answer 8

it should shorter i think , because it has lower degrees than another both of them BA = BD = 20cm

Answer 9

so either 10 or 20 cm?

Answer 10

i mean , they first leg both 20 cm BA=BD .. and they have different degree , the first one 40 degree , the second one 47 degree which has 15 as another leg, so I assume hat the first one 40 degree triangle has lower leg ( AC ) than DC

Answer 11

so lost lmao

Answer 12

try to look carefully ;)

Answer 13

@KingGeorge can you help

Answer 14

@Hero ?

Answer 15

Hint: Use law of sines

Answer 16

Or "eyeball" it as suggested above.

Answer 17

@47 degrees, CD = 15
@40 degrees, AC = something less than 15

Answer 18

10

Answer 19

See how easy that is?

40 < 47 therefore
AC < CD

Answer 20

yea lol