Question

Any Treca Digital Academy (TDA) Students knowing how to do the lesson Solving Problems with Right triangles can you please help me? :3

Answer 1

can u write any problem?

Answer 2

Jeremy finds a set of plans to build a model airplane. Most, but not all, of the lengths given in the plans are direct measurements. According to the plans, each horizontal stabilizer of the tail wing is made from a right triangle. The length of the leg of the triangle that touches the plane is AB = 8 inches, and cosA=817. To find the number of inches each horizontal stabilizer extends from the plane, find BC.

Answer 3

it would be shorter but im in the tutorial and got stuck :/

Answer 4

soory dont know this kind of stuff

Answer 5

@alivejeremy

Answer 6

me either lol i got stuck

Answer 7

Give me a min i'm helping someone right now <3

Answer 8

alright

Answer 9

cos A = AB/AC

817 = AB/8 [ GIVEN VALUES]

Answer 10

CAN U find AB =?

Answer 11

where did you get 817?

Answer 12

ohhh its supposed to say 8/17

Answer 13

cos A = 817 is given in the problem

Answer 14

right but it was supposed to say 8/17

Answer 15

now it becomes
8/17 = AB/8

Answer 16

ab/8 would be 1

Answer 17

forget all this,
i ' ll tell u one simple method

Answer 18

uhh okay

Answer 19

IS IT CLEAR

Answer 20

do u understand it?

Answer 21

if u get it i will continue

Answer 22

yeah my thing says this is how the tutorial solved it

\[\cos A=\frac{ AB }{ AC }=\frac{ 8 }{ 17}\]
\[AC=17\]
now apply the Pythagorean theorem to find BC
\[BC=\sqrt{AC^2-AB^2}\]
\[BC=\sqrt{17^2-8^2=}\sqrt{225=15}\]

Answer 23

so the answer would be 15

Answer 24

exactly,
u got it

Answer 25

right but i just dont understand how they solved it lol