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| Pregunta | Respuesta |
| Enter text here... | The angle between a chord and a tangent equals the angle in the alternate (opposite) segment. ( ∠ in alt. seg. ) |
| Enter text here... | The perpendicular from the centre to the chord bisects the chord. ( ⊥ from centre to chord ) |
| Enter text here... | Tangents from a point to a circle are the same length. ( equal tgt. ) |
| Enter text here... | The angle where the radius meets the tangent is 90º. ( tgt. ⊥ rad.) |
| Enter text here... | The exterior angle of a cyclic quadrilateral is equal to the interior opposite angle. ( ext. ∠, cyclic quad. ) |
| Enter text here... | Opposite angles of a cyclic quadrilateral add to 180º. ( opp. ∠'s, cyclic quad. ) |
| Enter text here... | Angles on the same arc are equal. ( ∠'s on same arc ) |
| Enter text here... | The angle in a semi-circle is a right angle. ( ∠ in semi-circle ) |
| Enter text here... | The angle at the centre is twice the angle at the circumference on the same arc. ( ∠ at centre ) |
| Enter text here... | Vertically Opposite angles are equal. ( Vert. pop. ∠'s ) |
| Enter text here... | Corresponding angles on parallel lines are equal. ( corresp. ∠'s, // lines ) |
| Enter text here... | Alternate angles on parallel lines are equal. ( alt. ∠'s, // lines ) |
| Enter text here... | Co-interior angles on parallel lines are equal. ( co-int. ∠'s, // lines ) |
| Enter text here... | The exterior angles of a polygon add to 360°. ( ext. ∠ sum of polygon ) |
| Enter text here... | A triangle is isosceles if two of its sides are formed from the radius(radii) of a circle ( isos. △, = radii ) |
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