Video narration
Here are the house walls and the two arcs meeting at A. Now let's complete our construction. From A, draw the straight side to B and measure it carefully: five centimetres. Then draw from A to C, also five centimetres. These equal sides will guide the roof of our house. With A as the centre and a radius of five centimetres, draw the curved arc from B to C. It joins the two measured ends, completing the roof. Notice: AB equals AC, both five centimetres. The earlier equal-radius arcs from the two given points helped us find A, a point equidistant-that means the same distance-from both points. And now, with A as the centre, the new roof arc reaches B and C at that same five-centimetre radius. Your turn: construct a bigger house, making every straight outer side seven centimetres. Try it in your notebook!