# Geometric Shapes: The Basics

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Geometric Shapes: The Basics

## 1. Triangles: Polygon with three sides and three interior angles.

### 1.1. Equilaterial Triangle: Polygon in which all three sides and three angles are congruent.

1.1.1. This crossing sign is an equilateral triangle.

### 1.2. Isosceles Triangle: Polygon where only two sides and two angles are congruent.

1.2.1. The roof of this house is an isosceles triangle.

### 1.3. Right Triangle: Polygon that has exactly one right angle.

1.3.1. This is an example of a right triangle.

## 6. Quadrilaterals: A geometric shape with four sides and angles.

### 6.1. Parallelogram: Quadrilateral with opposite sides parallel.

6.1.1. The U.S. flag is an example of a parallelogram.

### 6.2. Trapezoid: Quadrilateral that has at least one pair of parallel sides.

6.2.1. This is an example of a trapezoid.

### 6.3. Kite: Quadrilateral with two distinct pairs of congruent adjacent lengths.

6.3.1. The kites we played with as children is a great example.

### 6.4. Square: Rhombus with a right angle.

6.4.1. This Rubik's Cube is an example of many squares.

### 6.5. Rhombus: Quadrilateral where all sides have equal length.

6.5.1. This is an example of a rhombus.