Seriously question please answer I need it​

1. 16cm

2. 26dm

3. 20mm

4. 30dm

5. 78cm

Step-by-step explanation:

1. Perimeter of the square = 4cm + 4cm + 4cm + 4cm = 16cm

2. Perimeter = 8dm + 8dm + 5dm + 5dm

= 26dm

3. Perimeter of rectangle = 3mm + 3mm + 7mm + 7mm = 20mm

4. Perimeter of triangle = 8dm + 12dm + 10dm = 30dm

5. Perimeter = 23cm + 23cm + 16cm + 16cm = 78cm

last option

step-by-step explanation:

given that δdef is right and isoceles,

assuming that side df is the hypotenuse means that de an ef are the other 2 sides that intersect at 90° and are of equal length.

because they are of equal length, we can say that they are congruent

because they intersect at 90°, their slopes must be opposite reciprocals.

only the last option satisfies these conditions.

what? ?

what type of question is thiss

step-by-step explanation: