Isosceles right-angled triangle

Key term for Edexcel GCSE Mathematics, used in Mensuration and Calculation.

Definition

A triangle with a $90^\circ$ angle and two other angles measuring $45^\circ$ , meaning two of its sides are equal in length.

Exam Context

Isosceles right-angled triangle appears in Edexcel GCSE Mathematics revision content for Geometry and Measures, especially Mensuration and Calculation and Exact Trigonometric Values.

Geometry and Measures Mensuration and Calculation Exact Trigonometric Values

Found in Revision Notes

Geometry and Measures

Exact Trigonometric Values

Mensuration and Calculation • Exact Trigonometric Values

Revise note

Related Key Terms

Equilateral triangle Exact value Rationalising the denominator Surd

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