Answer:
1. c
2. a
3. b
4. e
5. d
Step-by-step explanation:
1. An equilateral triangle is a triangle with all three sides of equal length
2. a scalene triangle is a triangle that has no equal sides
3. An isosceles triangle therefore has both two equal sides and two equal angles.
4. An obtuse triangle is a triangle in which one of the angles is an obtuse angle.
5. An acute-angled triangle is a type of triangle in which all the three internal angles of the triangle are acute, that is, they measure less than 90°
