# What are different components to building shapes?

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What are different components to building shapes?

## 2. Shapes

### 2.1. The form of an object - how it is laid out in space (not what it is made of, or where it is).

2.1.1. 2D

2.1.1.1. https://www.mathsisfun.com/shape.html

2.1.1.2. Circles

2.1.1.3. Triangles

2.1.2. 3D

2.1.2.1. http://www.coolmath4kids.com/polyhedra/index.html

2.1.2.2. Spheres

2.1.2.3. Cubes

2.1.2.4. Pyramids

2.1.2.5. Cylinders

2.1.2.6. Prisms

## 3. Lines

### 3.2. is a straight one-dimensional figure having no thickness and extending infinitely in both directions.

3.2.1. Parallel

3.2.2. Perpendicular

3.2.3. Straight

## 5. Angles

### 5.1. The amount of turn between two straight lines that have a common end point (the vertex).

5.1.1. Acute

5.1.1.1. an angle that is less than 90°

5.1.2. Right

5.1.2.1. an angle that is 90° exactly

5.1.3. Obtuse

5.1.3.1. an angle that is greater than 90° but less than 180°

5.1.4. Straight

5.1.4.1. an angle that is 180° exactly

5.1.5. Reflex

5.1.5.1. an angle that is greater than 180°

5.1.6. Circle

5.1.6.1. an angle that equals 360°

## 7. Symmetry

### 7.2. Symmetry is when one shape becomes exactly like another if you flip, slide or turn it.

7.2.1. Reflection

7.2.2. Mirror

7.2.3. Rotational

7.2.4. Point

## 10. Draw and identify lines and angles, and classify shapes by properties of their lines and angles.

### 10.1. CCSS.MATH.CONTENT.4.G.A.1

10.1.1. Draw points, lines, line segments, rays, angles (right, acute, obtuse), and perpendicular and parallel lines. Identify these in two-dimensional figures.

### 10.2. CCSS.MATH.CONTENT.4.G.A.2

10.2.1. Classify two-dimensional figures based on the presence or absence of parallel or perpendicular lines, or the presence or absence of angles of a specified size. Recognize right triangles as a category, and identify right triangles.

### 10.3. CCSS.MATH.CONTENT.4.G.A.3

10.3.1. Recognize a line of symmetry for a two-dimensional figure as a line across the figure such that the figure can be folded along the line into matching parts. Identify line-symmetric figures and draw lines of symmetry.