4th graders work on different types of angles and how to measure them. They use protractors (transportadors) to measure acute, right, obtuse, straight and reflex angles:

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margin: auto;
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float: left;
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text-align: center;
width: 33%;
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#gallery-1 img {
border: 2px solid #cfcfcf;
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#gallery-1 .gallery-caption {
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/* see gallery_shortcode() in… Llegeix més»