Question

If the angles of triangle are in the ratio $3:4:5$ then find them

Answer 1

The sum of the interior angles of a triangle will be $180$$°$.

Therefore, think of the ratios of $3:4:5$ as variables followed by "x" ($3x,4x$, and $5x$).

Combine like terms and set the equation equal to $180$, the amt. of degrees in a triangle:

$(5+4+3)x$

$12x=180$

$x=15$

angles are $3\times 15,4\times 15,5\times 15=45,60,75.$