Examples of non-renewable energy are coal, oil, natural gas, uranium and fossil fuels. Ex. of renewable energy are animals, food, and biomass. Ex. of inexhaustible energy are â¦ wind, solar, geothermal, and hydroelectric.xamples of non-renewable energy are coal, oil, natural gas, uranium and fossil fuels. Ex. of renewable energy are animals, food, and biomass. Ex. of inexhaustible energy are â¦ wind, solar, geothermal, and hydroelectric.
How many lines of symmetry does a triangle have? The number of lines of symmetry a triangle has depends on the type of triangle. An equilateral triangle has three lines of symmetry, while an isosceles has one line of symmetry, and a scalene triangle has none.
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.