अध्याय 7 · Class 9 UP Board · Formula Sheet

Triangles Formulas — Class 9 UP Board

त्रिभुज — सर्वांगसमता नियम, समद्विबाहु त्रिभुज के गुण और असमिकाएँ।

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Worked Examples

1Using: Supplementary Angles

If one angle is 65 degrees, find its supplement.

Step 1: Supplement = 180 - 65

Step 2: = 115 degrees.

Answer: 115 degrees

2Using: Vertically Opposite

Two lines intersect. If one angle is 40 degrees, find the vertically opposite angle.

Step 1: Vertically opposite angles are equal.

Step 2: The angle = 40 degrees.

Answer: 40 degrees

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More Class 9 UP Board Formulas

Number SystemsPolynomialsCoordinate GeometryLinear Equations in Two VariablesIntroduction to Euclid's GeometryLines & Angles

Frequently Asked Questions

How many formulas are in Class 9 UP Board Triangles?+
There are several key formulas in the Triangles chapter for Class 9 UP Board. Each formula is essential for solving problems in this topic.
How to remember Triangles formulas easily?+
Practice regularly with worked examples, group related formulas together, and use SparkEd's interactive practice mode to reinforce your memory through problem-solving.
Are these Triangles formulas enough for exams?+
Yes, these formulas cover the complete UP Board Class 9 syllabus for Triangles. Practice applying them to different types of questions for full exam readiness.

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SparkEd Maths provides free formula sheets for Class 1-10 across 7 education boards. All formulas are aligned to the 2025-26 syllabus.