Question

just a few geometry problems can someone help me withh?! please!

Answer 1

what are the questions

Answer 2

16. Write the resultant of the two vectors as an ordered pair.

<3, 6> and <5, –5> (2 points)

Answer 3

do i add these?

Answer 4

im not sure with these ones..
@jim_thompson5910

Answer 5

yes you just add the corresponding components

Answer 6

so 8,1?

Answer 7

yep

Answer 8

17. Find the length of the missing side. The triangle is not drawn to scale.

Answer 9

would i use a2 + b2 =c2?

Answer 10

correct, in this case

a = unknown, you're solving for it
b = 15
c = 17

Answer 11

okay what about this one?

18. Describe the vector as an ordered pair. Round the coordinates to the nearest tenth. The diagram is not drawn to scale.

Answer 12

use the formulas

x = r*cos(theta)
y = r*sin(theta)

Answer 13

r = length of the vector
theta = angle of the vector

Answer 14

make sure you're in degree mode on your calculator

Answer 15

okay what exactly is theta? im a little confused on this one

Answer 16

theta is a variable commonly used for angles in trig

Answer 17

in this case, theta is 69 degrees

Answer 18

X component of the vector:


x = r*cos(theta)


x = 54*cos(69)


x = ???

------------------


Y component of the vector:


y = r*sin(theta)


y = 54*sin(69)


y = ???

Answer 19

okay for x i got 19.35...

Answer 20

the instructions are to "Round the coordinates to the nearest tenth."

so x = 19.4

Answer 21

what about y

Answer 22

50.4, now it says describe as ordered pair would that ust be x=19.4 and y=50.4, or do i have to write it 19.4,50.4?

Answer 23

(19.4, 50.4)

Answer 24

the parenthesis are crucial to what makes an ordered pair

Answer 25

but yeah you pretty much got it

Answer 26

okay only 4 more i think lol, what about this one?

Write the ratios for sin X and cos X.

Answer 27

ok well I'll do one more

Answer 28

the triangle is this