Question

WILL GIVE MEDALS!!!!!
The measure of the second angle of a triangle is twice the measure of the first angle. The measure of the third angle is 10° less than the measure of the first angle. Find the measure of the second angle.

Answer 1

The answer choices:
A. 47.5°
B. 80°
C. 37.5°
D. 95°

Answer 2

let first angle = x
then second angle = 2x

Answer 3

Okay what next?

Answer 4

and third angle = x - 10

Answer 5

Then?

Answer 6

well the 3 angles add up to 180
so we can write an equation
any ideas ?

Answer 7

Nope that's why I'm asking for help. If I knew how to set it up I could most likely do it.

Answer 8

x + 2x + x - 10 = 180

makes sense?

Answer 9

the 3 angles are on the left and 180 on the right

so now if you solve for x youll find the measure of the first angle
second angle = 2 8 x

Answer 10

* 2 * x

Answer 11

Okay how do I set up that part.

Answer 12

add up the first 3 terms x + 2x + x = ?

Answer 13

?

Answer 14

the angle x + twice the angle x + angle x = how many angle x's?

Answer 15

x + 2x + x = 3?

Answer 16

1 + 2 + 1 = how many

Answer 17

4, sorry I forgot to count both of the Xs for 2x.

Answer 18

right
1 + 2 + 1 = 5
in same way
x +2x + x = 4x

Answer 19

* lol thats 4 NOT 5!!

Answer 20

so we have
4x - 10 = 180

add 10 to both sides
4x - 10 + 10 = 180 + 10
4x = 190
x = 190/4

Answer 21

now divide 190 by 4 to get x
then multiply the result by 2 to get the values of 2x which is the values of the second angle

Answer 22

190 / 4 = 47.5
47.5 * 2 = 95

Answer 23

correct

Answer 24

That's the answer to the whole problem ain't it?

Answer 25

Thanks

Answer 26

yes yw