Question

What type of triangle is formed by joining the points D(7, 3), E(8, 1), and
F(4, -1)?

Answer 1

flexed use distance formula for calculating the distance b/w thesepoints from each other...as the first step

and in the second step... try and see if two sides are equal , if not then apply pythagoras theorem to see if its a right angle and if nothing from the two is possible then it is a scalene triangle