(Please serious answers only :( ) Kaeleb made an apple pie in the shape of a triangle. The side lengths of his pie are 9 centimeters. He wants to reduce each side by “x” centimeters so that the triangle is still equilateral and has a perimeter of 21 centimeters.
How many centimeters did Kaeleb reduce his triangular-shaped pie by?

He needs to reduce it 3 times so that the side lengths would 7.  

Step-by-step explanation:

because 7+7+7=21

I hope this helps :p

∠lno ≅ ∠lnm

∠oln ≅ ∠mln

step-by-step explanation:

given   that triangle lno is congruent to triangle lnm.

we have to fill up the blanks in the given question.

according to above order of congruency   kept in mind we can say that

∠lno ≅ ∠lnm

∠oln ≅ ∠mln

ln ≅ ln due to common in both.

hence, by sas congruency,

the side angle side rule   states that if two sides and the included angle of one triangle are congruent to another triangle, then these two triangles are congruent.