Question

If we construct ∆DEF in which DE = 4cm, EF = 3cm and DF = 5cm. Then find the measure of angle E​

Answer 1

Answer:

it follows the Pythagoras theorem so the measure of angle e is 90 degree

Answer 2

As 3,4&5 are pythagorean triplets therefore the triangle thus formed is a right angled triangle where the longest side
i.e DF is the hypotenuse and the vertice opposite to hypotenuse is a right angle.


Therefore angle E is 90degree