7). It is not possible. It is impossible. An "acute" triangle is a triangle in which all three angles are acute. "Acute" means "less than 90 degrees". A "right triangle" has a 90-degree angle in it, so all three of its angles can't possibly be acute.
8). Yes, Karen speaks the truth. In an equilateral triangle, all three angles have the same size, namely 60 degrees. Studying this number astutely, you will notice that it is less than 90 degrees. Therefore, all three angles in an equilateral triangle are acute angles. Therefore, every equilateral triangle is a cute one.
9). An equilateral triangle is one with all three sides the same length. An isosceles triangle is one with two sides the same length. A scalene triangle is one with all three sides different lengths. You can drawum.
