This document provides a 3-step summary of keystrokes for constructing a circle circumscribed about a triangle using the TI-Nspire calculator: 1) Create a geometry window, 2) Construct a circle by pressing buttons to set the diameter to half the screen size, and 3) Add three points on the circle and connect them to form the inscribed triangle.

1.
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TI‐Nspire Mini‐Tutorials
Circumscribing a Circle about a Triangle
Summary of Keystrokes
Create the geometry window:
c62b22
Construct a circle:
b81· (Press ` until the diameter of the circle
takes up half the screen, then press · .)
Add three points to the circle:
b13 `¢¤¡ (Use to move the pointer to three
· points on the circle. Press each time.)
(Change settings:
b22110e· .)
Connect the three points to form the triangle:
b65 `¢¤¡ (Use to move the pointer to one of
·
the points. Press , move to another point and press · .)
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