You can add a variety of diagrams, using the diagramming tools on the Drawing
toolbar (toolbar: A bar with buttons and options that you use to carry out commands. To display a toolbar, click Customize on the Tools menu, and then click the Toolbars tab.). Diagram types include Cycle (Cycle diagram: A diagram that is used to show a process that has a continuous cycle.), Target (Target diagram: A diagram that is used to show steps toward a goal.), Radial (Radial diagram: A diagram that is used to show relationships of elements to a core element.), Venn (Venn diagram: A diagram that is used to show areas of overlap between and among elements.), and Pyramid (Pyramid diagram: A diagram that is used to show foundation-based relationships.). Use the diagrams to illustrate various conceptual material and enliven documents and presentations (diagrams are not numerically based).

Diagram (radial type)
Diagram toolbar
Drawing sizing handle
Drawing border
When you add or change a diagram, the diagram appears with drawing space around it, outlined by a non-printing border and sizing handles. You can size the diagram by using sizing commands to make the drawing area larger so you have more room to work, or you can get rid of extra space by fitting the border more closely to the diagram.
Format the entire diagram with preset styles; or, format pieces of it like you format shapes— add color and text, change line weight and style, and add fills, textures, and backgrounds. Use the Diagram toolbar that appears with your diagram to add elements or segments and to move them forward or backward.
You can also animate (animate: To add a special visual or sound effect to text or an object. For example, you can have your text bullet points fly in from the left, one word at a time, or hear the sound of applause when a picture is uncovered.) a diagram to direct focus to different pieces of a diagram and control the flow of information during a presentation.
Flowcharts
Flowcharts (or flow diagrams) can be created using a combination of AutoShapes (AutoShapes: A group of ready-made shapes that includes basic shapes, such as rectangles and circles, plus a variety of lines and connectors, block arrows, flowchart symbols, stars and banners, and callouts.) on the Drawing toolbar, including flowchart shapes and connectors.

Connectors that are available
Some flowchart shapes that are available