Key Math Formulas — TEAS & HESI Cheat Sheet
Area, perimeter, volume
👤 By the CinnaEntry Content Team
🕐 Updated 2026-09-06
🏷️ TEAS Mathematics
🔖 Free to read, print, and share
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Use this one-page guide to lock in Key Math Formulas for the ATI TEAS 7 and HESI A2. Keep it handy during review and on exam day.
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📒 The 1-minute cheat sheet
📌 Rectangle
- Area = length × width
- Perimeter = 2(length + width)
📌 Triangle / Circle
- Triangle area = ½ × base × height
- Circle area = π r² · Circumference = 2 π r
📌 Volume
- Rectangular box = length × width × height
- Round to the place asked; keep units (cm², cm³)
✨Quick Tip
Focus on the highlighted terms — those are what the TEAS and HESI test most on key math formulas.
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