1. If a triangle has angles 135', 15', 30'. Is it an obtuse triangle?
2. An triangle has 2 equal angles, which are the angles opposite the 2 equal sides is?
3. An exterior angle of a triangle is equal to the sum of the two opposite interior angles.
4. The perimeter of an equilateral triangle is 15cm. What is the length of one side?
5. A scalene triangle has three different length sides, and three different angles.
6. An equilateral triangle has three equal lengths, and all the angles are equal which means they are each 60°