#### Geometry and Measurement

The videos in this post explain **mathematics Texas Essential Knowledge and Skill 3.6**:

Geometry and measurement. The student applies mathematical process standards to analyze attributes of two-dimensional geometric figures to develop generalizations about their properties.

*The STAAR videos below are selected released items from 3rd grade STAAR tests in 2016, 2018, 2019, and 2021. You can view the complete review of the 2017 STAAR test *__here__*.*

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## 3.6A

classify and sort two- and three-dimensional figures, including cones, cylinders, spheres, triangular and rectangular prisms, and cubes, based on attributes using formal geometric language

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### STAAR Videos

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## 3.6B

use attributes to recognize rhombuses, parallelograms, trapezoids, rectangles, and squares as examples of quadrilaterals and draw examples of quadrilaterals that do not belong to any of these subcategories

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### STAAR Video

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## 3.6C

determine the area of rectangles with whole number side lengths in problems using multiplication related to the number of rows times the number of unit squares in each row

### Teaching Video

### STAAR Videos

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## 3.6D

decompose composite figures formed by rectangles into non-overlapping rectangles to determine the area of the original figure using the additive property of area

### Teaching video

### STAAR Video

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## 3.6E

decompose two congruent two-dimensional figures into parts with equal areas and express the area of each part as a unit fraction of the whole and recognize that equal shares of identical wholes need not have the same shape

### Teaching video

### STAAR Videos

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To view all the posts for the 3rd Grade Reporting Category 3 review, click __here__.

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