Question

question
estimate the measure of $angle lmn$ to the nearest $10^{\circ}$.
answer attempt 1 out of 2
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Explanation:

Step1: Compare to right angle

A right angle is $90^\circ$. $\angle LMN$ is smaller than $90^\circ$, between $0^\circ$ and $90^\circ$.

Step2: Estimate to nearest 10°

The angle appears to be about one-fifth of a straight angle ($180^\circ$), or $\frac{180^\circ}{5}=30^\circ$, which is a multiple of $10^\circ$.

Answer:

$30^\circ$