Prove that the triangle EDF is isosceles.

Give reasons for your answer.

y + 180/2

Step-by-step explanation:

90 + y/2

2 x 90 + y/2

2 x 90/2 + y/2

2 x 90 + y/2

2 x 90 + y/2

180 + y/2

180 + y/2

y + 180/ 2

y + 180/2

since proposition states that a number is greater than 25, if is true then the number must actually be greater than 25.

this implies that all possible options, except 24, can be accepted

d

step-by-step explanation: