Mathematics 10 — Exercise Review · Q2

Full question

Circle radius 1.4 cm: construct a tangent at P on the circumference.

Step-by-step solution

  1. Draw the circle using the specified centre O and radius. Mark the contact point P on its circumference.

  2. Join O to P and extend OP through P.

  3. Mark equal distances on both sides of P along this line. With those two marks as centres draw equal intersecting arcs. Join their intersection to P.

  4. Extend that perpendicular in both directions; call it APB. It makes 90° with OP and is the required tangent.

  5. Check with a set square that OP is perpendicular to APB and the line touches the circle only at P.

Answer

The construction above gives the required circle or tangent.

OPABOP=7/5 cmDiagram not to scale