Question

find perimeter by measuring lengths mastery check find the perimeter.

Explanation:

Step1: Measure side lengths

Let's assume the side - lengths measured from the ruler are \(a\), \(b\), and \(c\). Suppose \(a = 6\) cm, \(b = 4\) cm, \(c = 5\) cm (these are example values based on visual estimation as actual values are not clearly given).

Step2: Calculate perimeter

The perimeter \(P\) of a triangle is \(P=a + b + c\). Substituting the values, we get \(P=6 + 4+5\).
\(P = 15\) cm

Answer:

15 cm