Overview of Resources. The chief mineral resources produced in Cuba, which aided its economy in 2010, were nickel and cobalt. The mining sector also produced other minerals such as cement, feldspar, gypsum, iron ore, lime, limestone, asphalt, bentonite, chromite, zeolite, marble, steel, and sulfuric acid. Crude petroleum production by 10.7%.
Classification of Triangles. Triangles may be classified by. (A) their sides. (B) their angles. A scalene triangle has 3 different sides. An isosceles triangle has two equal sides and one side that is not equal. An equilateral triangle has 3 equal sides.In an acute triangle, all of the angles will measure less than 90 degrees. A right triangle will always have one 90-degree angle. An obtuse triangle will always have one angle whose measure is greater than 90 degrees but at the same time less than 180 degrees.Median and Altitude (Height). A median of a triangle is a segment drawn from a vertex of the triangle to the midpoint of the opposite side.lassification of Triangles. Triangles may be classified by. (A) their sides. (B) their angles. A scalene triangle has 3 different sides. An isosceles triangle has two equal sides and one side that is not equal. An equilateral triangle has 3 equal sides.
You are right - an equilateral triangle cannot have an obtuse angle. In fact, the angles are all fixed - they are each 60 degrees. Try this: take three equal length pencils and form a triangle. Now take three more pencils and try to form a triangle that has angles different from the first.