2/3 is your answer. 4 and 6 both divided by 2.

The** length** of the **missing side **of the triangle is** 6 cm.**

<h3>

**Triangle**</h3>

A triangle is a** polygon** with** three sides and three angle**s. Types of triangles are isosceles, equilateral, obtuse and scalene triangle.

The **perimeter** of a triangle is the** sum of all the sides** of the triangle. Let **x **represent the **missing length**. Also, let the other sides be 3 cm and 10 m.

Hence:

Perimeter = x + 3 + 10

19 = x + 13

**x = 6 cm**

The** length** of the **missing side **of the triangle is** 6 cm.**

Find out more on **Triangle **at: brainly.com/question/23945265

**Answer:**

d. (9,-260°)

**Step-by-step explanation:**

100° = 100-360 = -260°