Question

13. The ratio of angles of a triangle is 1:2:3, then the largest angle is a) 30° b) 60° c) 90° d) 180°​

Answer 1

Answer:

d 180 is the answer of the question

Answer 2

Given,

The ratio of angles of a triangle is $1:2:3$,

Then we have to find the largest angle

We know that

The sum of angles of a triangle is $180^{0}$

Let,

The first angle be $x$

Second angle be $2x$

Third angle be $3x$

Now,

$x+2x+3x=180$

$6x=180$

$x= \frac{180}{6}$

$x=30$

Substitute $x=30$ in $2x$ and $3x$

$2x=30\times2=60$

$3x=3\times30=90$

Therefore, the largest angle is $90^{0}$.