Question

what is the length of leg s of the triangle below?

Answer 1

do you know sin 45 = ?

Answer 2

no

Answer 3

you have learned it sure

Answer 4

and you need to know again sinus of an angle is equale using the proportionalitie of sides

Answer 5

sin(θ) = Opposite / Hypotenuse

Answer 6

yes so now you need to know just the value of sin 45 = ?

Answer 7

45= x+10 squareroot 2?

Answer 8

no the value of sin 45 = sqrt2 / 2

but if you check your triangle you not can using sinus for calculi x

so than you can using what ?

Answer 9

ok yes you can using sinus too becasue this is an equilateral triangle

Answer 10

than you can writing it now ?

Answer 11

will be

sin 45 = s / 10sqrt2

Answer 12

so than

s = ?

Answer 13

14

Answer 14

how you have got this result ?

Answer 15

you know that sin 45 = sqrt2 /2

Answer 16

so than you can writing

sqrt2 /2 = s / 10sqrt2

from this you need to calculi s = ?

Answer 17

sqrt2 / 2= 1

Answer 18

why ?

how you have got 1 ?

Answer 19

sqrt2 s
------ = --------
2 10sqrt2

so what you will get if you cross multiplie ?

Answer 20

sqrt2 * 10sqrt2 = 2s

can you continue ?

Answer 21

sqrt2 *sqrt2 = ?