Meet TRISOLV, the TI-84 Plus CE calculator program built to conquer every triangle problem on the SAT. No more fumbling with separate formulas—just pick your scenario, enter the known values, and TRISOLV does the rest:

Key Features

• Right Triangles: Find any missing side or angle using Pythagorean theorem and angle-sum checks.

• Trigonometric Ratios: Calculate sin θ, cos θ, and tan θ with built-in fraction output.

• Similar Triangles: Match corresponding angles and compute scale factors.

• 30-60-90 & 45-45-90 Triangles: Automatic exact and decimal results for all special-case triangles.

• Triangle Area: Choose base × height, Heron’s formula, or ½ ab sin C.

• Perimeter & Equilateral: Sum sides, find missing side from total perimeter, or compute equilateral properties.

• Intuitive Menus: Clean, single-letter labels and clear “Back” options make navigation a breeze.

• Degree Mode: Angles always in ° to match SAT conventions.

What You’ll Need

1. TI-84 Plus CE (or CE Python) calculator

2. TI Connect™ CE software (free from Texas Instruments)

3. USB cable to link your calculator and computer

THIS IS INCLUDED IN THE SAT MATH PROGRAM. IF YOU HAVE THAT PROGRAM, DO NOT BUY THIS!

Installation & Support

1. Download TRISOLV from your mcstutoring.com account.

2. Open TI Connect CE and drag the .8xp file onto your calculator icon.

3. Press PRGM → TRISOLV → ENTER on your calculator.

Need help?

• ▶️ Watch our quick install video

• 📖 Troubleshooting & FAQs

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Disclaimer: This calculator program is designed to help you work through triangle questions more efficiently. It does not guarantee a particular SAT score or grade—it’s a study aid, not a replacement for your own review and practice.