Question

If measures
of three angles of a
triangle are known, how many
triangles can be construed?​

Answer 1

180 degree

The measures of the three angles of a triangle are represented by x, 3x, and x+30. What is the value of x? This problem requires knowing that the sum of the interior angles in any triangle = 180 deg.

Answer 2

1. Lodestone, a natural magnet, attracting iron nails. Ancient humans discovered the property of magnetism from lodestone.
3. An illustration from Gilbert's 1600 De Magnete showing one of the earliest methods of making a magnet. A blacksmith holds a piece of red-hot iron in a north–south direction and hammers it as it cools. The magnetic field of the Earth aligns the domains, leaving the iron a weak magnet.
5. Drawing of a medical treatment using magnetic brushes. Charles Jacque 1843, France.

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