Question

Find the area of this triangle. Round the sine value to the nearest hundredth. Round the area to the nearest tenth of a centimeter.

A) 29.1 cm2


B) 42.4 cm2


C) 48.9 cm2


D) 58.2 cm2

Answer 1

hello there u can use herons formula to find the area
A=sqrt(s*(s-a)*(s-b)*(s-c))
s=(a+b+c)/2

Answer 2

can you do it now?

Answer 3

can u place the numbers in there so i can solve it

Answer 4

a=7.2
b=12.1
c=8.3
s=13.8

A=sqrt(13.8*(13.8-7.2)*(13.8-8.3)*(13.8-12.1))

Answer 5

A=5.96

Answer 6

:)

Answer 7

is that right?

Answer 8

@rohitmathew

Answer 9

you did all the calculations right.. then it is :)

Answer 10

yea but i dont think were done bcs thats not in the answer choices..

Answer 11

can anyone plz help me get the RIGHT answer

Answer 12

There is a side angle side formula

Answer 13

29.18

Answer 14

thats the answer i got..

Answer 15

:).. just try once more

Answer 16

so why did u tell me my answer was correct @rohitmathew

Answer 17

noo.. i didnt calculate and check.. thats why i asked you if you did the calculations right, your answer is right

Answer 18

Area = 1/2 * side1 * sine (angle) * side2
Area = 1/2 * 7.2 * sine (103) * 8.3
Area = 29.88 * 0.97437
Area = 29.1141756

Answer 19

The formula I used is the side angle side formula
http://www.1728.org/triang.htm
Towards the bottom of the page

Answer 20

thanks @wolf1728

Answer 21

u r welcome :-)

Answer 22

@addicto sorry if i confused you