Identify, describe and compare basic shapes according to their geometric attributes.

Benchmarks1. Describe, compare, and classify two- and three-dimensional figures according to number and shape of faces, and the number of sides, edges and vertices (corners).

Examples

2. Identify and name basic two- and three-dimensional shapes, such as squares, circles, triangles, rectangles, trapezoids, hexagons, cubes, rectangular prisms, cones, cylinders and spheres

Use a drawing program to show several ways that a rectangle can be decomposed into exactly three triangles.

Understand length as a measurable attribute; use tools to measure length

1. Understand the relationship between the size of the unit of measurement and the number of units needed to measure the length of an object.

It will take more paper clips than whiteboard markers to measure the length of a table.

2. Demonstrate an understanding of the relationship between length and the numbers on a ruler by using a ruler to measure lengths to the nearest centimeter or inch.

Draw a line segment that is 3 inches long.

Use time and money in real-world and mathematical situations.1. Tell time to the quarter-hour and distinguish between a.m. and p.m.

2. Identify pennies, nickels, dimes and quarters. Find the value of a group of coins and determine combinations of coins that equal a given amount.

Use geometric attributes to describe and create shapes in various contexts.

1. Identify parallel and perpendicular lines in various contexts, and use them to describe and create geometric shapes, such as right triangles, rectangles, parallelograms and trapezoids.

2. Sketch polygons with a given number of sides or vertices (corners), such as pentagons, hexagons and octagons.

## Identify, describe and compare basic shapes according to their geometric attributes.

Use a drawing program to show several ways that a rectangle can be decomposed into exactly three triangles.## Understand length as a measurable attribute; use tools to measure length

It will take more paper clips than whiteboard markers to measure the length of a table.Draw a line segment that is 3 inches long.## Use time and money in real-world and mathematical situations.1. Tell time to the quarter-hour and distinguish between a.m. and p.m.

## Use geometric attributes to describe and create shapes in various contexts.