Question

question find m∠onm. answer attempt 2 out of 2 m∠onm = ° submit answer watch video

Explanation:

Step1: Identify isosceles - triangle property

Since $ON = MN$, $\triangle OMN$ is isosceles. In an isosceles triangle, the base - angles are equal. Let $\angle O=\angle OMN$. Given $\angle O = 25^{\circ}$, so $\angle OMN=25^{\circ}$.

Step2: Use angle - sum property of a triangle

The sum of the interior angles of a triangle is $180^{\circ}$. In $\triangle OMN$, we want to find $\angle ONM$. Let $\angle ONM = x$. Then $x + 25^{\circ}+25^{\circ}=180^{\circ}$.

Step3: Solve for $\angle ONM$

$x=180^{\circ}-(25^{\circ}+25^{\circ})=130^{\circ}$.

Answer:

$130$