This post explains and gives practice opportunities related to TEKS __3.7B__:

determine the perimeter of a polygon or a missing length when given perimeter and remaining side lengths in problems

## Instruction

Perimeter is more than just adding up all the sides. Sometimes students are given a perimeter and need to use that to find missing sides.

## STAAR Practice

Between 2016 and 2023 (including redesign practice), this readiness standard has been tested 13 times on the STAAR test. Videos explaining each problem can be found below. If you'd rather take a quiz over these questions, click __here__. The videos below are linked to each question in the quiz as answer explanations after the quiz is submitted.

To view all the posts in this 3rd grade TEKS review series, click __here__.

## Comments