Question

estimate the measure of $\angle ijk$ to the nearest $10^{\circ}$.

Explanation:

Step1: Identify angle vertex

The vertex of $\angle IJK$ is point $J$, formed by segments $JI$ and $JK$.

Step2: Compare to known angles

The angle is larger than a right angle ($90^\circ$) but smaller than $180^\circ$, and appears close to $100^\circ$ when estimating to the nearest $10^\circ$.

Answer:

$100^\circ$