Question

@jim_thompson5910 help me please
Write an equation that could be used to find the m 13 years ago

Answer 1

@goformit100

Answer 2

Given this triangle



we can use the law of cosines to say

c^2 = a^2 + b^2 - 2ab*cos(C)

or

b^2 = a^2 + c^2 - 2ac*cos(B)

or

a^2 = b^2 + c^2 - 2bc*cos(A)

Answer 3

idk what to do

Answer 4

@jim_thompson5910

Answer 5

which side is opposite angle R

Answer 6

ummm 72

Answer 7

72? how are you getting that

Answer 8

i have no idea

Answer 9

idk help maybe?

Answer 10

circle the side that's opposite angle R

Answer 11

oh 5!

Answer 12

no that side is part of angle R

Answer 13

6?

Answer 14

angle S is opposite the side that's 6 units long

Answer 15

oh

Answer 16

i still dont get it lol

Answer 17

the opposite side is basically the side that's furthest from the angle

Answer 18

so its 7

Answer 19

jim you there boo?

Answer 20

yes the side length that's 7 units is opposite angle R

Answer 21

ok what do i do now

Answer 22

so you'll have something of the form

7^2 = a^2 + b^2 - ab*cos(R)

where you'll replace a and b with the proper values

Answer 23

52 ad 62?

Answer 24

5^2 and 6^2, yes

Answer 25

ok now what

Answer 26

a = 5 and b = 6, you just said it

Answer 27

so plug them in

Answer 28

is this A B C or D

Answer 29

???? i dont understand