Question

In triangle ABC, triangle C is a right angle. Find the remaining sides and angles. Round your answer to the nearest tenth. a=3, c=19

Answer 1

Use Pythagoras relationship.
A^2 + b^2= c^2

Answer 2

c would be the hypotenuse so
c^2 = a^2 + b^2
19^2 = 3^2 + b^2
361 = 9 + b^2
352 = b^2
b = sq root (352)

Answer 3

Ok I found the side c=18.8 but I need to find Angels now

Answer 4

yes side c = 18.7616630393

To find the angles you need to use trigonometry

Answer 5

It would help to have a graphic - I'll make one

Answer 6

Ok

Answer 7

I have no idea what to use please help me to solve this

Answer 8

In triangle ABC, triangle C is a right angle. Find the remaining sides and angles. Round your answer to the nearest tenth. a=3, c=19 sin(A) = 3/19
------------
B = 90 - A

Answer 9

ur anwers above

Answer 10

What is B== 90-A is ? I lost

Answer 11

sin(A) = 3/19
------------
B = 90 - A

Answer 12

Okay here's the graphic

Answer 13

did it at least help you my explanation

Answer 14

the sine of angle a = opposite/hypotenuse
the sine of angle a = 3/19

Answer 15

Ok

Answer 16

we need to find what angle has a sine of 0.1578947368 (which is 3/19)
To do this we need to find the arc sine of 0.1578947368
Here's a good calculator to use:
http://www.1728.org/trigcalc.htm

Answer 17

Please help me find that please

Answer 18

Okay if you go to the calculator, input 0.1578947368 where it says
Input >>> <<<<Input
then click "asin" (which means arc sine

Answer 19

After that what to solve?

Answer 20

You are solving for angle a
which equals 9.0847 Degrees
Then to solve angle b you calculate
90 - 9.0847 Degrees which equals 80.9153 degrees

Answer 21

That should be all the sides and angles you had to solve.
Any questions about any of that?

Answer 22

What is arcsine means? Is inverse of sine?

Answer 23

I'm have only It84

Answer 24

Is asine is inverse of sine?

Answer 25

I'm still confused on sinA =c/b
................................................
B=90-A.
What it means ? Please